/* * Mesa 3-D graphics library * Version: 6.5 * * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /** * Functions for allocating/managing renderbuffers. * Also, routines for reading/writing software-based renderbuffer data as * ubytes, ushorts, uints, etc. * * The 'alpha8' renderbuffer is interesting. It's used to add a software-based * alpha channel to RGB renderbuffers. This is done by wrapping the RGB * renderbuffer with the alpha renderbuffer. We can do this because of the * OO-nature of renderbuffers. * * Down the road we'll use this for run-time support of 8, 16 and 32-bit * color channels. For example, Mesa may use 32-bit/float color channels * internally (swrast) and use wrapper renderbuffers to convert 32-bit * values down to 16 or 8-bit values for whatever kind of framebuffer we have. */ #include "glheader.h" #include "imports.h" #include "context.h" #include "fbobject.h" #include "formats.h" #include "mtypes.h" #include "renderbuffer.h" /* * Routines for get/put values in common buffer formats follow. */ static void * get_pointer_generic(struct gl_context *ctx, struct gl_renderbuffer *rb, GLint x, GLint y) { if (!rb->Data) return NULL; return (rb->Data + (y * rb->RowStride + x) * _mesa_get_format_bytes(rb->Format)); } /********************************************************************** * Functions for buffers of 1 X GLubyte values. * Typically stencil. */ static void get_row_ubyte(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, void *values) { const GLubyte *src = (const GLubyte *) rb->Data + y * rb->RowStride + x; ASSERT(rb->DataType == GL_UNSIGNED_BYTE); memcpy(values, src, count * sizeof(GLubyte)); } static void get_values_ubyte(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], void *values) { GLubyte *dst = (GLubyte *) values; GLuint i; ASSERT(rb->DataType == GL_UNSIGNED_BYTE); for (i = 0; i < count; i++) { const GLubyte *src = (GLubyte *) rb->Data + y[i] * rb->RowStride + x[i]; dst[i] = *src; } } static void put_row_ubyte(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, const void *values, const GLubyte *mask) { const GLubyte *src = (const GLubyte *) values; GLubyte *dst = (GLubyte *) rb->Data + y * rb->RowStride + x; ASSERT(rb->DataType == GL_UNSIGNED_BYTE); if (mask) { GLuint i; for (i = 0; i < count; i++) { if (mask[i]) { dst[i] = src[i]; } } } else { memcpy(dst, values, count * sizeof(GLubyte)); } } static void put_mono_row_ubyte(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, const void *value, const GLubyte *mask) { const GLubyte val = *((const GLubyte *) value); GLubyte *dst = (GLubyte *) rb->Data + y * rb->RowStride + x; ASSERT(rb->DataType == GL_UNSIGNED_BYTE); if (mask) { GLuint i; for (i = 0; i < count; i++) { if (mask[i]) { dst[i] = val; } } } else { GLuint i; for (i = 0; i < count; i++) { dst[i] = val; } } } static void put_values_ubyte(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], const void *values, const GLubyte *mask) { const GLubyte *src = (const GLubyte *) values; GLuint i; ASSERT(rb->DataType == GL_UNSIGNED_BYTE); for (i = 0; i < count; i++) { if (!mask || mask[i]) { GLubyte *dst = (GLubyte *) rb->Data + y[i] * rb->RowStride + x[i]; *dst = src[i]; } } } static void put_mono_values_ubyte(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], const void *value, const GLubyte *mask) { const GLubyte val = *((const GLubyte *) value); GLuint i; ASSERT(rb->DataType == GL_UNSIGNED_BYTE); for (i = 0; i < count; i++) { if (!mask || mask[i]) { GLubyte *dst = (GLubyte *) rb->Data + y[i] * rb->RowStride + x[i]; *dst = val; } } } /********************************************************************** * Functions for buffers of 1 X GLushort values. * Typically depth/Z. */ static void get_row_ushort(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, void *values) { const void *src = rb->GetPointer(ctx, rb, x, y); ASSERT(rb->DataType == GL_UNSIGNED_SHORT); memcpy(values, src, count * sizeof(GLushort)); } static void get_values_ushort(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], void *values) { GLushort *dst = (GLushort *) values; GLuint i; ASSERT(rb->DataType == GL_UNSIGNED_SHORT); for (i = 0; i < count; i++) { const GLushort *src = (GLushort *) rb->Data + y[i] * rb->RowStride + x[i]; dst[i] = *src; } } static void put_row_ushort(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, const void *values, const GLubyte *mask) { const GLushort *src = (const GLushort *) values; GLushort *dst = (GLushort *) rb->Data + y * rb->RowStride + x; ASSERT(rb->DataType == GL_UNSIGNED_SHORT); if (mask) { GLuint i; for (i = 0; i < count; i++) { if (mask[i]) { dst[i] = src[i]; } } } else { memcpy(dst, src, count * sizeof(GLushort)); } } static void put_mono_row_ushort(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, const void *value, const GLubyte *mask) { const GLushort val = *((const GLushort *) value); GLushort *dst = (GLushort *) rb->Data + y * rb->RowStride + x; ASSERT(rb->DataType == GL_UNSIGNED_SHORT); if (mask) { GLuint i; for (i = 0; i < count; i++) { if (mask[i]) { dst[i] = val; } } } else { GLuint i; for (i = 0; i < count; i++) { dst[i] = val; } } } static void put_values_ushort(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], const void *values, const GLubyte *mask) { const GLushort *src = (const GLushort *) values; GLuint i; ASSERT(rb->DataType == GL_UNSIGNED_SHORT); for (i = 0; i < count; i++) { if (!mask || mask[i]) { GLushort *dst = (GLushort *) rb->Data + y[i] * rb->RowStride + x[i]; *dst = src[i]; } } } static void put_mono_values_ushort(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], const void *value, const GLubyte *mask) { const GLushort val = *((const GLushort *) value); ASSERT(rb->DataType == GL_UNSIGNED_SHORT); if (mask) { GLuint i; for (i = 0; i < count; i++) { if (mask[i]) { GLushort *dst = (GLushort *) rb->Data + y[i] * rb->RowStride + x[i]; *dst = val; } } } else { GLuint i; for (i = 0; i < count; i++) { GLushort *dst = (GLushort *) rb->Data + y[i] * rb->RowStride + x[i]; *dst = val; } } } /********************************************************************** * Functions for buffers of 1 X GLuint values. * Typically depth/Z or color index. */ static void get_row_uint(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, void *values) { const void *src = rb->GetPointer(ctx, rb, x, y); ASSERT(rb->DataType == GL_UNSIGNED_INT || rb->DataType == GL_UNSIGNED_INT_24_8_EXT); memcpy(values, src, count * sizeof(GLuint)); } static void get_values_uint(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], void *values) { GLuint *dst = (GLuint *) values; GLuint i; ASSERT(rb->DataType == GL_UNSIGNED_INT || rb->DataType == GL_UNSIGNED_INT_24_8_EXT); for (i = 0; i < count; i++) { const GLuint *src = (GLuint *) rb->Data + y[i] * rb->RowStride + x[i]; dst[i] = *src; } } static void put_row_uint(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, const void *values, const GLubyte *mask) { const GLuint *src = (const GLuint *) values; GLuint *dst = (GLuint *) rb->Data + y * rb->RowStride + x; ASSERT(rb->DataType == GL_UNSIGNED_INT || rb->DataType == GL_UNSIGNED_INT_24_8_EXT); if (mask) { GLuint i; for (i = 0; i < count; i++) { if (mask[i]) { dst[i] = src[i]; } } } else { memcpy(dst, src, count * sizeof(GLuint)); } } static void put_mono_row_uint(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, const void *value, const GLubyte *mask) { const GLuint val = *((const GLuint *) value); GLuint *dst = (GLuint *) rb->Data + y * rb->RowStride + x; ASSERT(rb->DataType == GL_UNSIGNED_INT || rb->DataType == GL_UNSIGNED_INT_24_8_EXT); if (mask) { GLuint i; for (i = 0; i < count; i++) { if (mask[i]) { dst[i] = val; } } } else { GLuint i; for (i = 0; i < count; i++) { dst[i] = val; } } } static void put_values_uint(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], const void *values, const GLubyte *mask) { const GLuint *src = (const GLuint *) values; GLuint i; ASSERT(rb->DataType == GL_UNSIGNED_INT || rb->DataType == GL_UNSIGNED_INT_24_8_EXT); for (i = 0; i < count; i++) { if (!mask || mask[i]) { GLuint *dst = (GLuint *) rb->Data + y[i] * rb->RowStride + x[i]; *dst = src[i]; } } } static void put_mono_values_uint(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], const void *value, const GLubyte *mask) { const GLuint val = *((const GLuint *) value); GLuint i; ASSERT(rb->DataType == GL_UNSIGNED_INT || rb->DataType == GL_UNSIGNED_INT_24_8_EXT); for (i = 0; i < count; i++) { if (!mask || mask[i]) { GLuint *dst = (GLuint *) rb->Data + y[i] * rb->RowStride + x[i]; *dst = val; } } } /********************************************************************** * Functions for buffers of 3 X GLubyte (or GLbyte) values. * Typically color buffers. * NOTE: the incoming and outgoing colors are RGBA! We ignore incoming * alpha values and return 255 for outgoing alpha values. */ static void * get_pointer_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLint x, GLint y) { ASSERT(rb->Format == MESA_FORMAT_RGB888); /* No direct access since this buffer is RGB but caller will be * treating it as if it were RGBA. */ return NULL; } static void get_row_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, void *values) { const GLubyte *src = (const GLubyte *) (rb->Data + 3 * (y * rb->RowStride + x)); GLubyte *dst = (GLubyte *) values; GLuint i; ASSERT(rb->Format == MESA_FORMAT_RGB888); ASSERT(rb->DataType == GL_UNSIGNED_BYTE); for (i = 0; i < count; i++) { dst[i * 4 + 0] = src[i * 3 + 0]; dst[i * 4 + 1] = src[i * 3 + 1]; dst[i * 4 + 2] = src[i * 3 + 2]; dst[i * 4 + 3] = 255; } } static void get_values_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], void *values) { GLubyte *dst = (GLubyte *) values; GLuint i; ASSERT(rb->Format == MESA_FORMAT_RGB888); ASSERT(rb->DataType == GL_UNSIGNED_BYTE); for (i = 0; i < count; i++) { const GLubyte *src = (GLubyte *) rb->Data + 3 * (y[i] * rb->RowStride + x[i]); dst[i * 4 + 0] = src[0]; dst[i * 4 + 1] = src[1]; dst[i * 4 + 2] = src[2]; dst[i * 4 + 3] = 255; } } static void put_row_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, const void *values, const GLubyte *mask) { /* note: incoming values are RGB+A! */ const GLubyte *src = (const GLubyte *) values; GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->RowStride + x); GLuint i; ASSERT(rb->Format == MESA_FORMAT_RGB888); ASSERT(rb->DataType == GL_UNSIGNED_BYTE); for (i = 0; i < count; i++) { if (!mask || mask[i]) { dst[i * 3 + 0] = src[i * 4 + 0]; dst[i * 3 + 1] = src[i * 4 + 1]; dst[i * 3 + 2] = src[i * 4 + 2]; } } } static void put_row_rgb_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, const void *values, const GLubyte *mask) { /* note: incoming values are RGB+A! */ const GLubyte *src = (const GLubyte *) values; GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->RowStride + x); GLuint i; ASSERT(rb->Format == MESA_FORMAT_RGB888); ASSERT(rb->DataType == GL_UNSIGNED_BYTE); for (i = 0; i < count; i++) { if (!mask || mask[i]) { dst[i * 3 + 0] = src[i * 3 + 0]; dst[i * 3 + 1] = src[i * 3 + 1]; dst[i * 3 + 2] = src[i * 3 + 2]; } } } static void put_mono_row_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, const void *value, const GLubyte *mask) { /* note: incoming value is RGB+A! */ const GLubyte val0 = ((const GLubyte *) value)[0]; const GLubyte val1 = ((const GLubyte *) value)[1]; const GLubyte val2 = ((const GLubyte *) value)[2]; GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->RowStride + x); ASSERT(rb->Format == MESA_FORMAT_RGB888); ASSERT(rb->DataType == GL_UNSIGNED_BYTE); if (!mask && val0 == val1 && val1 == val2) { /* optimized case */ memset(dst, val0, 3 * count); } else { GLuint i; for (i = 0; i < count; i++) { if (!mask || mask[i]) { dst[i * 3 + 0] = val0; dst[i * 3 + 1] = val1; dst[i * 3 + 2] = val2; } } } } static void put_values_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], const void *values, const GLubyte *mask) { /* note: incoming values are RGB+A! */ const GLubyte *src = (const GLubyte *) values; GLuint i; ASSERT(rb->Format == MESA_FORMAT_RGB888); ASSERT(rb->DataType == GL_UNSIGNED_BYTE); for (i = 0; i < count; i++) { if (!mask || mask[i]) { GLubyte *dst = (GLubyte *) rb->Data + 3 * (y[i] * rb->RowStride + x[i]); dst[0] = src[i * 4 + 0]; dst[1] = src[i * 4 + 1]; dst[2] = src[i * 4 + 2]; } } } static void put_mono_values_ubyte3(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], const void *value, const GLubyte *mask) { /* note: incoming value is RGB+A! */ const GLubyte val0 = ((const GLubyte *) value)[0]; const GLubyte val1 = ((const GLubyte *) value)[1]; const GLubyte val2 = ((const GLubyte *) value)[2]; GLuint i; ASSERT(rb->Format == MESA_FORMAT_RGB888); ASSERT(rb->DataType == GL_UNSIGNED_BYTE); for (i = 0; i < count; i++) { if (!mask || mask[i]) { GLubyte *dst = (GLubyte *) (rb->Data + 3 * (y[i] * rb->RowStride + x[i])); dst[0] = val0; dst[1] = val1; dst[2] = val2; } } } /********************************************************************** * Functions for buffers of 4 X GLubyte (or GLbyte) values. * Typically color buffers. */ static void get_row_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, void *values) { const GLubyte *src = (const GLubyte *) (rb->Data + 4 * (y * rb->RowStride + x)); ASSERT(rb->DataType == GL_UNSIGNED_BYTE); ASSERT(rb->Format == MESA_FORMAT_RGBA8888); memcpy(values, src, 4 * count * sizeof(GLubyte)); } static void get_values_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], void *values) { /* treat 4*GLubyte as 1*GLuint */ GLuint *dst = (GLuint *) values; GLuint i; ASSERT(rb->DataType == GL_UNSIGNED_BYTE); ASSERT(rb->Format == MESA_FORMAT_RGBA8888); for (i = 0; i < count; i++) { const GLuint *src = (GLuint *) rb->Data + (y[i] * rb->RowStride + x[i]); dst[i] = *src; } } static void put_row_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, const void *values, const GLubyte *mask) { /* treat 4*GLubyte as 1*GLuint */ const GLuint *src = (const GLuint *) values; GLuint *dst = (GLuint *) rb->Data + (y * rb->RowStride + x); ASSERT(rb->DataType == GL_UNSIGNED_BYTE); ASSERT(rb->Format == MESA_FORMAT_RGBA8888); if (mask) { GLuint i; for (i = 0; i < count; i++) { if (mask[i]) { dst[i] = src[i]; } } } else { memcpy(dst, src, 4 * count * sizeof(GLubyte)); } } static void put_row_rgb_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, const void *values, const GLubyte *mask) { /* Store RGB values in RGBA buffer */ const GLubyte *src = (const GLubyte *) values; GLubyte *dst = (GLubyte *) rb->Data + 4 * (y * rb->RowStride + x); GLuint i; ASSERT(rb->DataType == GL_UNSIGNED_BYTE); ASSERT(rb->Format == MESA_FORMAT_RGBA8888); for (i = 0; i < count; i++) { if (!mask || mask[i]) { dst[i * 4 + 0] = src[i * 3 + 0]; dst[i * 4 + 1] = src[i * 3 + 1]; dst[i * 4 + 2] = src[i * 3 + 2]; dst[i * 4 + 3] = 0xff; } } } static void put_mono_row_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, const void *value, const GLubyte *mask) { /* treat 4*GLubyte as 1*GLuint */ const GLuint val = *((const GLuint *) value); GLuint *dst = (GLuint *) rb->Data + (y * rb->RowStride + x); ASSERT(rb->DataType == GL_UNSIGNED_BYTE); ASSERT(rb->Format == MESA_FORMAT_RGBA8888); if (!mask && val == 0) { /* common case */ memset(dst, 0, count * 4 * sizeof(GLubyte)); } else { /* general case */ if (mask) { GLuint i; for (i = 0; i < count; i++) { if (mask[i]) { dst[i] = val; } } } else { GLuint i; for (i = 0; i < count; i++) { dst[i] = val; } } } } static void put_values_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], const void *values, const GLubyte *mask) { /* treat 4*GLubyte as 1*GLuint */ const GLuint *src = (const GLuint *) values; GLuint i; ASSERT(rb->DataType == GL_UNSIGNED_BYTE); ASSERT(rb->Format == MESA_FORMAT_RGBA8888); for (i = 0; i < count; i++) { if (!mask || mask[i]) { GLuint *dst = (GLuint *) rb->Data + (y[i] * rb->RowStride + x[i]); *dst = src[i]; } } } static void put_mono_values_ubyte4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], const void *value, const GLubyte *mask) { /* treat 4*GLubyte as 1*GLuint */ const GLuint val = *((const GLuint *) value); GLuint i; ASSERT(rb->DataType == GL_UNSIGNED_BYTE); ASSERT(rb->Format == MESA_FORMAT_RGBA8888); for (i = 0; i < count; i++) { if (!mask || mask[i]) { GLuint *dst = (GLuint *) rb->Data + (y[i] * rb->RowStride + x[i]); *dst = val; } } } /********************************************************************** * Functions for buffers of 4 X GLushort (or GLshort) values. * Typically accum buffer. */ static void get_row_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, void *values) { const GLshort *src = (const GLshort *) (rb->Data + 4 * (y * rb->RowStride + x)); ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); memcpy(values, src, 4 * count * sizeof(GLshort)); } static void get_values_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], void *values) { GLushort *dst = (GLushort *) values; GLuint i; ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); for (i = 0; i < count; i++) { const GLushort *src = (GLushort *) rb->Data + 4 * (y[i] * rb->RowStride + x[i]); dst[i] = *src; } } static void put_row_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, const void *values, const GLubyte *mask) { const GLushort *src = (const GLushort *) values; GLushort *dst = (GLushort *) rb->Data + 4 * (y * rb->RowStride + x); ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); if (mask) { GLuint i; for (i = 0; i < count; i++) { if (mask[i]) { dst[i * 4 + 0] = src[i * 4 + 0]; dst[i * 4 + 1] = src[i * 4 + 1]; dst[i * 4 + 2] = src[i * 4 + 2]; dst[i * 4 + 3] = src[i * 4 + 3]; } } } else { memcpy(dst, src, 4 * count * sizeof(GLushort)); } } static void put_row_rgb_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, const void *values, const GLubyte *mask) { /* Put RGB values in RGBA buffer */ const GLushort *src = (const GLushort *) values; GLushort *dst = (GLushort *) rb->Data + 4 * (y * rb->RowStride + x); ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); if (mask) { GLuint i; for (i = 0; i < count; i++) { if (mask[i]) { dst[i * 4 + 0] = src[i * 3 + 0]; dst[i * 4 + 1] = src[i * 3 + 1]; dst[i * 4 + 2] = src[i * 3 + 2]; dst[i * 4 + 3] = 0xffff; } } } else { memcpy(dst, src, 4 * count * sizeof(GLushort)); } } static void put_mono_row_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, GLint x, GLint y, const void *value, const GLubyte *mask) { const GLushort val0 = ((const GLushort *) value)[0]; const GLushort val1 = ((const GLushort *) value)[1]; const GLushort val2 = ((const GLushort *) value)[2]; const GLushort val3 = ((const GLushort *) value)[3]; GLushort *dst = (GLushort *) rb->Data + 4 * (y * rb->RowStride + x); ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); if (!mask && val0 == 0 && val1 == 0 && val2 == 0 && val3 == 0) { /* common case for clearing accum buffer */ memset(dst, 0, count * 4 * sizeof(GLushort)); } else { GLuint i; for (i = 0; i < count; i++) { if (!mask || mask[i]) { dst[i * 4 + 0] = val0; dst[i * 4 + 1] = val1; dst[i * 4 + 2] = val2; dst[i * 4 + 3] = val3; } } } } static void put_values_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], const void *values, const GLubyte *mask) { const GLushort *src = (const GLushort *) values; GLuint i; ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); for (i = 0; i < count; i++) { if (!mask || mask[i]) { GLushort *dst = (GLushort *) (rb->Data + 4 * (y[i] * rb->RowStride + x[i])); dst[0] = src[i * 4 + 0]; dst[1] = src[i * 4 + 1]; dst[2] = src[i * 4 + 2]; dst[3] = src[i * 4 + 3]; } } } static void put_mono_values_ushort4(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count, const GLint x[], const GLint y[], const void *value, const GLubyte *mask) { const GLushort val0 = ((const GLushort *) value)[0]; const GLushort val1 = ((const GLushort *) value)[1]; const GLushort val2 = ((const GLushort *) value)[2]; const GLushort val3 = ((const GLushort *) value)[3]; GLuint i; ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); for (i = 0; i < count; i++) { if (!mask || mask[i]) { GLushort *dst = (GLushort *) (rb->Data + 4 * (y[i] * rb->RowStride + x[i])); dst[0] = val0; dst[1] = val1; dst[2] = val2; dst[3] = val3; } } } /** * This is the default software fallback for gl_renderbuffer's span * access functions. * * The assumptions are that rb->Data will be a pointer to (0,0), that pixels * are packed in the type of rb->Format, and that subsequent rows appear * rb->RowStride pixels later. */ void _mesa_set_renderbuffer_accessors(struct gl_renderbuffer *rb) { rb->GetPointer = get_pointer_generic; switch (rb->Format) { case MESA_FORMAT_RGB888: rb->DataType = GL_UNSIGNED_BYTE; rb->GetPointer = get_pointer_ubyte3; rb->GetRow = get_row_ubyte3; rb->GetValues = get_values_ubyte3; rb->PutRow = put_row_ubyte3; rb->PutRowRGB = put_row_rgb_ubyte3; rb->PutMonoRow = put_mono_row_ubyte3; rb->PutValues = put_values_ubyte3; rb->PutMonoValues = put_mono_values_ubyte3; break; case MESA_FORMAT_RGBA8888: rb->DataType = GL_UNSIGNED_BYTE; rb->GetRow = get_row_ubyte4; rb->GetValues = get_values_ubyte4; rb->PutRow = put_row_ubyte4; rb->PutRowRGB = put_row_rgb_ubyte4; rb->PutMonoRow = put_mono_row_ubyte4; rb->PutValues = put_values_ubyte4; rb->PutMonoValues = put_mono_values_ubyte4; break; case MESA_FORMAT_SIGNED_RGBA_16: rb->DataType = GL_SHORT; rb->GetRow = get_row_ushort4; rb->GetValues = get_values_ushort4; rb->PutRow = put_row_ushort4; rb->PutRowRGB = put_row_rgb_ushort4; rb->PutMonoRow = put_mono_row_ushort4; rb->PutValues = put_values_ushort4; rb->PutMonoValues = put_mono_values_ushort4; break; #if 0 case MESA_FORMAT_A8: rb->DataType = GL_UNSIGNED_BYTE; rb->GetRow = get_row_alpha8; rb->GetValues = get_values_alpha8; rb->PutRow = put_row_alpha8; rb->PutRowRGB = NULL; rb->PutMonoRow = put_mono_row_alpha8; rb->PutValues = put_values_alpha8; rb->PutMonoValues = put_mono_values_alpha8; break; #endif case MESA_FORMAT_S8: rb->DataType = GL_UNSIGNED_BYTE; rb->GetRow = get_row_ubyte; rb->GetValues = get_values_ubyte; rb->PutRow = put_row_ubyte; rb->PutRowRGB = NULL; rb->PutMonoRow = put_mono_row_ubyte; rb->PutValues = put_values_ubyte; rb->PutMonoValues = put_mono_values_ubyte; break; case MESA_FORMAT_Z16: rb->DataType = GL_UNSIGNED_SHORT; rb->GetRow = get_row_ushort; rb->GetValues = get_values_ushort; rb->PutRow = put_row_ushort; rb->PutRowRGB = NULL; rb->PutMonoRow = put_mono_row_ushort; rb->PutValues = put_values_ushort; rb->PutMonoValues = put_mono_values_ushort; break; case MESA_FORMAT_Z32: case MESA_FORMAT_X8_Z24: case MESA_FORMAT_Z24_X8: rb->DataType = GL_UNSIGNED_INT; rb->GetRow = get_row_uint; rb->GetValues = get_values_uint; rb->PutRow = put_row_uint; rb->PutRowRGB = NULL; rb->PutMonoRow = put_mono_row_uint; rb->PutValues = put_values_uint; rb->PutMonoValues = put_mono_values_uint; break; case MESA_FORMAT_Z24_S8: case MESA_FORMAT_S8_Z24: rb->DataType = GL_UNSIGNED_INT_24_8_EXT; rb->GetRow = get_row_uint; rb->GetValues = get_values_uint; rb->PutRow = put_row_uint; rb->PutRowRGB = NULL; rb->PutMonoRow = put_mono_row_uint; rb->PutValues = put_values_uint; rb->PutMonoValues = put_mono_values_uint; break; default: break; } } /** * This is a software fallback for the gl_renderbuffer->AllocStorage * function. * Device drivers will typically override this function for the buffers * which it manages (typically color buffers, Z and stencil). * Other buffers (like software accumulation and aux buffers) which the driver * doesn't manage can be handled with this function. * * This one multi-purpose function can allocate stencil, depth, accum, color * or color-index buffers! * * This function also plugs in the appropriate GetPointer, Get/PutRow and * Get/PutValues functions. */ GLboolean _mesa_soft_renderbuffer_storage(struct gl_context *ctx, struct gl_renderbuffer *rb, GLenum internalFormat, GLuint width, GLuint height) { switch (internalFormat) { case GL_RGB: case GL_R3_G3_B2: case GL_RGB4: case GL_RGB5: case GL_RGB8: case GL_RGB10: case GL_RGB12: case GL_RGB16: rb->Format = MESA_FORMAT_RGB888; break; case GL_RGBA: case GL_RGBA2: case GL_RGBA4: case GL_RGB5_A1: case GL_RGBA8: #if 1 case GL_RGB10_A2: case GL_RGBA12: #endif rb->Format = MESA_FORMAT_RGBA8888; break; case GL_RGBA16: case GL_RGBA16_SNORM: /* for accum buffer */ rb->Format = MESA_FORMAT_SIGNED_RGBA_16; break; #if 0 case GL_ALPHA8: rb->Format = MESA_FORMAT_A8; break; #endif case GL_STENCIL_INDEX: case GL_STENCIL_INDEX1_EXT: case GL_STENCIL_INDEX4_EXT: case GL_STENCIL_INDEX8_EXT: case GL_STENCIL_INDEX16_EXT: rb->Format = MESA_FORMAT_S8; break; case GL_DEPTH_COMPONENT: case GL_DEPTH_COMPONENT16: rb->Format = MESA_FORMAT_Z16; break; case GL_DEPTH_COMPONENT24: rb->Format = MESA_FORMAT_X8_Z24; break; case GL_DEPTH_COMPONENT32: rb->Format = MESA_FORMAT_Z32; break; case GL_DEPTH_STENCIL_EXT: case GL_DEPTH24_STENCIL8_EXT: rb->Format = MESA_FORMAT_Z24_S8; break; default: /* unsupported format */ return GL_FALSE; } _mesa_set_renderbuffer_accessors(rb); ASSERT(rb->DataType); ASSERT(rb->GetPointer); ASSERT(rb->GetRow); ASSERT(rb->GetValues); ASSERT(rb->PutRow); ASSERT(rb->PutMonoRow); ASSERT(rb->PutValues); ASSERT(rb->PutMonoValues); /* free old buffer storage */ if (rb->Data) { free(rb->Data); rb->Data = NULL; } rb->RowStride = width; if (width > 0 && height > 0) { /* allocate new buffer storage */ rb->Data = malloc(width * height * _mesa_get_format_bytes(rb->Format)); if (rb->Data == NULL) { rb->Width = 0; rb->Height = 0; rb->RowStride = 0; _mesa_error(ctx, GL_OUT_OF_MEMORY, "software renderbuffer allocation (%d x %d x %d)", width, height, _mesa_get_format_bytes(rb->Format)); return GL_FALSE; } } rb->Width = width; rb->Height = height; rb->_BaseFormat = _mesa_base_fbo_format(ctx, internalFormat); if (rb->Name == 0 && internalFormat == GL_RGBA16_SNORM && rb->_BaseFormat == 0) { /* NOTE: This is a special case just for accumulation buffers. * This is a very limited use case- there's no snorm texturing or * rendering going on. */ rb->_BaseFormat = GL_RGBA; } else { /* the internalFormat should have been error checked long ago */ ASSERT(rb->_BaseFormat); } return GL_TRUE; } /**********************************************************************/ /**********************************************************************/ /**********************************************************************/ /** * Here we utilize the gl_renderbuffer->Wrapper field to put an alpha * buffer wrapper around an existing RGB renderbuffer (hw or sw). * * When PutRow is called (for example), we store the alpha values in * this buffer, then pass on the PutRow call to the wrapped RGB * buffer. */ static GLboolean alloc_storage_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLenum internalFormat, GLuint width, GLuint height) { ASSERT(arb != arb->Wrapped); ASSERT(arb->Format == MESA_FORMAT_A8); /* first, pass the call to the wrapped RGB buffer */ if (!arb->Wrapped->AllocStorage(ctx, arb->Wrapped, internalFormat, width, height)) { return GL_FALSE; } /* next, resize my alpha buffer */ if (arb->Data) { free(arb->Data); } arb->Data = malloc(width * height * sizeof(GLubyte)); if (arb->Data == NULL) { arb->Width = 0; arb->Height = 0; _mesa_error(ctx, GL_OUT_OF_MEMORY, "software alpha buffer allocation"); return GL_FALSE; } arb->Width = width; arb->Height = height; arb->RowStride = width; return GL_TRUE; } /** * Delete an alpha_renderbuffer object, as well as the wrapped RGB buffer. */ static void delete_renderbuffer_alpha8(struct gl_renderbuffer *arb) { if (arb->Data) { free(arb->Data); } ASSERT(arb->Wrapped); ASSERT(arb != arb->Wrapped); arb->Wrapped->Delete(arb->Wrapped); arb->Wrapped = NULL; free(arb); } static void * get_pointer_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLint x, GLint y) { return NULL; /* don't allow direct access! */ } static void get_row_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count, GLint x, GLint y, void *values) { /* NOTE: 'values' is RGBA format! */ const GLubyte *src = (const GLubyte *) arb->Data + y * arb->RowStride + x; GLubyte *dst = (GLubyte *) values; GLuint i; ASSERT(arb != arb->Wrapped); ASSERT(arb->DataType == GL_UNSIGNED_BYTE); /* first, pass the call to the wrapped RGB buffer */ arb->Wrapped->GetRow(ctx, arb->Wrapped, count, x, y, values); /* second, fill in alpha values from this buffer! */ for (i = 0; i < count; i++) { dst[i * 4 + 3] = src[i]; } } static void get_values_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count, const GLint x[], const GLint y[], void *values) { GLubyte *dst = (GLubyte *) values; GLuint i; ASSERT(arb != arb->Wrapped); ASSERT(arb->DataType == GL_UNSIGNED_BYTE); /* first, pass the call to the wrapped RGB buffer */ arb->Wrapped->GetValues(ctx, arb->Wrapped, count, x, y, values); /* second, fill in alpha values from this buffer! */ for (i = 0; i < count; i++) { const GLubyte *src = (GLubyte *) arb->Data + y[i] * arb->RowStride + x[i]; dst[i * 4 + 3] = *src; } } static void put_row_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count, GLint x, GLint y, const void *values, const GLubyte *mask) { const GLubyte *src = (const GLubyte *) values; GLubyte *dst = (GLubyte *) arb->Data + y * arb->RowStride + x; GLuint i; ASSERT(arb != arb->Wrapped); ASSERT(arb->DataType == GL_UNSIGNED_BYTE); /* first, pass the call to the wrapped RGB buffer */ arb->Wrapped->PutRow(ctx, arb->Wrapped, count, x, y, values, mask); /* second, store alpha in our buffer */ for (i = 0; i < count; i++) { if (!mask || mask[i]) { dst[i] = src[i * 4 + 3]; } } } static void put_row_rgb_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count, GLint x, GLint y, const void *values, const GLubyte *mask) { const GLubyte *src = (const GLubyte *) values; GLubyte *dst = (GLubyte *) arb->Data + y * arb->RowStride + x; GLuint i; ASSERT(arb != arb->Wrapped); ASSERT(arb->DataType == GL_UNSIGNED_BYTE); /* first, pass the call to the wrapped RGB buffer */ arb->Wrapped->PutRowRGB(ctx, arb->Wrapped, count, x, y, values, mask); /* second, store alpha in our buffer */ for (i = 0; i < count; i++) { if (!mask || mask[i]) { dst[i] = src[i * 4 + 3]; } } } static void put_mono_row_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count, GLint x, GLint y, const void *value, const GLubyte *mask) { const GLubyte val = ((const GLubyte *) value)[3]; GLubyte *dst = (GLubyte *) arb->Data + y * arb->RowStride + x; ASSERT(arb != arb->Wrapped); ASSERT(arb->DataType == GL_UNSIGNED_BYTE); /* first, pass the call to the wrapped RGB buffer */ arb->Wrapped->PutMonoRow(ctx, arb->Wrapped, count, x, y, value, mask); /* second, store alpha in our buffer */ if (mask) { GLuint i; for (i = 0; i < count; i++) { if (mask[i]) { dst[i] = val; } } } else { memset(dst, val, count); } } static void put_values_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count, const GLint x[], const GLint y[], const void *values, const GLubyte *mask) { const GLubyte *src = (const GLubyte *) values; GLuint i; ASSERT(arb != arb->Wrapped); ASSERT(arb->DataType == GL_UNSIGNED_BYTE); /* first, pass the call to the wrapped RGB buffer */ arb->Wrapped->PutValues(ctx, arb->Wrapped, count, x, y, values, mask); /* second, store alpha in our buffer */ for (i = 0; i < count; i++) { if (!mask || mask[i]) { GLubyte *dst = (GLubyte *) arb->Data + y[i] * arb->RowStride + x[i]; *dst = src[i * 4 + 3]; } } } static void put_mono_values_alpha8(struct gl_context *ctx, struct gl_renderbuffer *arb, GLuint count, const GLint x[], const GLint y[], const void *value, const GLubyte *mask) { const GLubyte val = ((const GLubyte *) value)[3]; GLuint i; ASSERT(arb != arb->Wrapped); ASSERT(arb->DataType == GL_UNSIGNED_BYTE); /* first, pass the call to the wrapped RGB buffer */ arb->Wrapped->PutValues(ctx, arb->Wrapped, count, x, y, value, mask); /* second, store alpha in our buffer */ for (i = 0; i < count; i++) { if (!mask || mask[i]) { GLubyte *dst = (GLubyte *) arb->Data + y[i] * arb->RowStride + x[i]; *dst = val; } } } static void copy_buffer_alpha8(struct gl_renderbuffer* dst, struct gl_renderbuffer* src) { ASSERT(dst->Format == MESA_FORMAT_A8); ASSERT(src->Format == MESA_FORMAT_A8); ASSERT(dst->Width == src->Width); ASSERT(dst->Height == src->Height); ASSERT(dst->RowStride == src->RowStride); memcpy(dst->Data, src->Data, dst->RowStride * dst->Height * sizeof(GLubyte)); } /**********************************************************************/ /**********************************************************************/ /**********************************************************************/ /** * Default GetPointer routine. Always return NULL to indicate that * direct buffer access is not supported. */ static void * nop_get_pointer(struct gl_context *ctx, struct gl_renderbuffer *rb, GLint x, GLint y) { return NULL; } /** * Initialize the fields of a gl_renderbuffer to default values. */ void _mesa_init_renderbuffer(struct gl_renderbuffer *rb, GLuint name) { _glthread_INIT_MUTEX(rb->Mutex); rb->ClassID = 0; rb->Name = name; rb->RefCount = 0; rb->Delete = _mesa_delete_renderbuffer; /* The rest of these should be set later by the caller of this function or * the AllocStorage method: */ rb->AllocStorage = NULL; rb->Width = 0; rb->Height = 0; rb->InternalFormat = GL_NONE; rb->Format = MESA_FORMAT_NONE; rb->DataType = GL_NONE; rb->Data = NULL; /* Point back to ourself so that we don't have to check for Wrapped==NULL * all over the drivers. */ rb->Wrapped = rb; rb->GetPointer = nop_get_pointer; rb->GetRow = NULL; rb->GetValues = NULL; rb->PutRow = NULL; rb->PutRowRGB = NULL; rb->PutMonoRow = NULL; rb->PutValues = NULL; rb->PutMonoValues = NULL; } /** * Allocate a new gl_renderbuffer object. This can be used for user-created * renderbuffers or window-system renderbuffers. */ struct gl_renderbuffer * _mesa_new_renderbuffer(struct gl_context *ctx, GLuint name) { struct gl_renderbuffer *rb = CALLOC_STRUCT(gl_renderbuffer); if (rb) { _mesa_init_renderbuffer(rb, name); } return rb; } /** * Delete a gl_framebuffer. * This is the default function for renderbuffer->Delete(). */ void _mesa_delete_renderbuffer(struct gl_renderbuffer *rb) { if (rb->Data) { free(rb->Data); } free(rb); } /** * Allocate a software-based renderbuffer. This is called via the * ctx->Driver.NewRenderbuffer() function when the user creates a new * renderbuffer. * This would not be used for hardware-based renderbuffers. */ struct gl_renderbuffer * _mesa_new_soft_renderbuffer(struct gl_context *ctx, GLuint name) { struct gl_renderbuffer *rb = _mesa_new_renderbuffer(ctx, name); if (rb) { rb->AllocStorage = _mesa_soft_renderbuffer_storage; /* Normally, one would setup the PutRow, GetRow, etc functions here. * But we're doing that in the _mesa_soft_renderbuffer_storage() function * instead. */ } return rb; } /** * Add software-based color renderbuffers to the given framebuffer. * This is a helper routine for device drivers when creating a * window system framebuffer (not a user-created render/framebuffer). * Once this function is called, you can basically forget about this * renderbuffer; core Mesa will handle all the buffer management and * rendering! */ GLboolean _mesa_add_color_renderbuffers(struct gl_context *ctx, struct gl_framebuffer *fb, GLuint rgbBits, GLuint alphaBits, GLboolean frontLeft, GLboolean backLeft, GLboolean frontRight, GLboolean backRight) { gl_buffer_index b; if (rgbBits > 16 || alphaBits > 16) { _mesa_problem(ctx, "Unsupported bit depth in _mesa_add_color_renderbuffers"); return GL_FALSE; } assert(MAX_COLOR_ATTACHMENTS >= 4); for (b = BUFFER_FRONT_LEFT; b <= BUFFER_BACK_RIGHT; b++) { struct gl_renderbuffer *rb; if (b == BUFFER_FRONT_LEFT && !frontLeft) continue; else if (b == BUFFER_BACK_LEFT && !backLeft) continue; else if (b == BUFFER_FRONT_RIGHT && !frontRight) continue; else if (b == BUFFER_BACK_RIGHT && !backRight) continue; assert(fb->Attachment[b].Renderbuffer == NULL); rb = _mesa_new_renderbuffer(ctx, 0); if (!rb) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating color buffer"); return GL_FALSE; } if (rgbBits <= 8) { if (alphaBits) rb->Format = MESA_FORMAT_RGBA8888; else rb->Format = MESA_FORMAT_RGB888; } else { assert(rgbBits <= 16); rb->Format = MESA_FORMAT_NONE; /*XXX RGBA16;*/ } rb->InternalFormat = GL_RGBA; rb->AllocStorage = _mesa_soft_renderbuffer_storage; _mesa_add_renderbuffer(fb, b, rb); } return GL_TRUE; } /** * Add software-based alpha renderbuffers to the given framebuffer. * This is a helper routine for device drivers when creating a * window system framebuffer (not a user-created render/framebuffer). * Once this function is called, you can basically forget about this * renderbuffer; core Mesa will handle all the buffer management and * rendering! */ GLboolean _mesa_add_alpha_renderbuffers(struct gl_context *ctx, struct gl_framebuffer *fb, GLuint alphaBits, GLboolean frontLeft, GLboolean backLeft, GLboolean frontRight, GLboolean backRight) { gl_buffer_index b; /* for window system framebuffers only! */ assert(fb->Name == 0); if (alphaBits > 8) { _mesa_problem(ctx, "Unsupported bit depth in _mesa_add_alpha_renderbuffers"); return GL_FALSE; } assert(MAX_COLOR_ATTACHMENTS >= 4); /* Wrap each of the RGB color buffers with an alpha renderbuffer. */ for (b = BUFFER_FRONT_LEFT; b <= BUFFER_BACK_RIGHT; b++) { struct gl_renderbuffer *arb; if (b == BUFFER_FRONT_LEFT && !frontLeft) continue; else if (b == BUFFER_BACK_LEFT && !backLeft) continue; else if (b == BUFFER_FRONT_RIGHT && !frontRight) continue; else if (b == BUFFER_BACK_RIGHT && !backRight) continue; /* the RGB buffer to wrap must already exist!! */ assert(fb->Attachment[b].Renderbuffer); /* only GLubyte supported for now */ assert(fb->Attachment[b].Renderbuffer->DataType == GL_UNSIGNED_BYTE); /* allocate alpha renderbuffer */ arb = _mesa_new_renderbuffer(ctx, 0); if (!arb) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating alpha buffer"); return GL_FALSE; } /* wrap the alpha renderbuffer around the RGB renderbuffer */ arb->Wrapped = fb->Attachment[b].Renderbuffer; /* Set up my alphabuffer fields and plug in my functions. * The functions will put/get the alpha values from/to RGBA arrays * and then call the wrapped buffer's functions to handle the RGB * values. */ arb->InternalFormat = arb->Wrapped->InternalFormat; arb->Format = MESA_FORMAT_A8; arb->DataType = arb->Wrapped->DataType; arb->AllocStorage = alloc_storage_alpha8; arb->Delete = delete_renderbuffer_alpha8; arb->GetPointer = get_pointer_alpha8; arb->GetRow = get_row_alpha8; arb->GetValues = get_values_alpha8; arb->PutRow = put_row_alpha8; arb->PutRowRGB = put_row_rgb_alpha8; arb->PutMonoRow = put_mono_row_alpha8; arb->PutValues = put_values_alpha8; arb->PutMonoValues = put_mono_values_alpha8; /* clear the pointer to avoid assertion/sanity check failure later */ fb->Attachment[b].Renderbuffer = NULL; /* plug the alpha renderbuffer into the colorbuffer attachment */ _mesa_add_renderbuffer(fb, b, arb); } return GL_TRUE; } /** * For framebuffers that use a software alpha channel wrapper * created by _mesa_add_alpha_renderbuffer or _mesa_add_soft_renderbuffers, * copy the back buffer alpha channel into the front buffer alpha channel. */ void _mesa_copy_soft_alpha_renderbuffers(struct gl_context *ctx, struct gl_framebuffer *fb) { if (fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer && fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer) copy_buffer_alpha8(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer, fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer); if (fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer && fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer) copy_buffer_alpha8(fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer, fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer); } /** * Add a software-based depth renderbuffer to the given framebuffer. * This is a helper routine for device drivers when creating a * window system framebuffer (not a user-created render/framebuffer). * Once this function is called, you can basically forget about this * renderbuffer; core Mesa will handle all the buffer management and * rendering! */ GLboolean _mesa_add_depth_renderbuffer(struct gl_context *ctx, struct gl_framebuffer *fb, GLuint depthBits) { struct gl_renderbuffer *rb; if (depthBits > 32) { _mesa_problem(ctx, "Unsupported depthBits in _mesa_add_depth_renderbuffer"); return GL_FALSE; } assert(fb->Attachment[BUFFER_DEPTH].Renderbuffer == NULL); rb = _mesa_new_renderbuffer(ctx, 0); if (!rb) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating depth buffer"); return GL_FALSE; } if (depthBits <= 16) { rb->Format = MESA_FORMAT_Z16; rb->InternalFormat = GL_DEPTH_COMPONENT16; } else if (depthBits <= 24) { rb->Format = MESA_FORMAT_X8_Z24; rb->InternalFormat = GL_DEPTH_COMPONENT24; } else { rb->Format = MESA_FORMAT_Z32; rb->InternalFormat = GL_DEPTH_COMPONENT32; } rb->AllocStorage = _mesa_soft_renderbuffer_storage; _mesa_add_renderbuffer(fb, BUFFER_DEPTH, rb); return GL_TRUE; } /** * Add a software-based stencil renderbuffer to the given framebuffer. * This is a helper routine for device drivers when creating a * window system framebuffer (not a user-created render/framebuffer). * Once this function is called, you can basically forget about this * renderbuffer; core Mesa will handle all the buffer management and * rendering! */ GLboolean _mesa_add_stencil_renderbuffer(struct gl_context *ctx, struct gl_framebuffer *fb, GLuint stencilBits) { struct gl_renderbuffer *rb; if (stencilBits > 16) { _mesa_problem(ctx, "Unsupported stencilBits in _mesa_add_stencil_renderbuffer"); return GL_FALSE; } assert(fb->Attachment[BUFFER_STENCIL].Renderbuffer == NULL); rb = _mesa_new_renderbuffer(ctx, 0); if (!rb) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating stencil buffer"); return GL_FALSE; } assert(stencilBits <= 8); rb->Format = MESA_FORMAT_S8; rb->InternalFormat = GL_STENCIL_INDEX8; rb->AllocStorage = _mesa_soft_renderbuffer_storage; _mesa_add_renderbuffer(fb, BUFFER_STENCIL, rb); return GL_TRUE; } /** * Add a software-based accumulation renderbuffer to the given framebuffer. * This is a helper routine for device drivers when creating a * window system framebuffer (not a user-created render/framebuffer). * Once this function is called, you can basically forget about this * renderbuffer; core Mesa will handle all the buffer management and * rendering! */ GLboolean _mesa_add_accum_renderbuffer(struct gl_context *ctx, struct gl_framebuffer *fb, GLuint redBits, GLuint greenBits, GLuint blueBits, GLuint alphaBits) { struct gl_renderbuffer *rb; if (redBits > 16 || greenBits > 16 || blueBits > 16 || alphaBits > 16) { _mesa_problem(ctx, "Unsupported accumBits in _mesa_add_accum_renderbuffer"); return GL_FALSE; } assert(fb->Attachment[BUFFER_ACCUM].Renderbuffer == NULL); rb = _mesa_new_renderbuffer(ctx, 0); if (!rb) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating accum buffer"); return GL_FALSE; } rb->Format = MESA_FORMAT_SIGNED_RGBA_16; rb->InternalFormat = GL_RGBA16_SNORM; rb->AllocStorage = _mesa_soft_renderbuffer_storage; _mesa_add_renderbuffer(fb, BUFFER_ACCUM, rb); return GL_TRUE; } /** * Add a software-based aux renderbuffer to the given framebuffer. * This is a helper routine for device drivers when creating a * window system framebuffer (not a user-created render/framebuffer). * Once this function is called, you can basically forget about this * renderbuffer; core Mesa will handle all the buffer management and * rendering! * * NOTE: color-index aux buffers not supported. */ GLboolean _mesa_add_aux_renderbuffers(struct gl_context *ctx, struct gl_framebuffer *fb, GLuint colorBits, GLuint numBuffers) { GLuint i; if (colorBits > 16) { _mesa_problem(ctx, "Unsupported accumBits in _mesa_add_aux_renderbuffers"); return GL_FALSE; } assert(numBuffers <= MAX_AUX_BUFFERS); for (i = 0; i < numBuffers; i++) { struct gl_renderbuffer *rb = _mesa_new_renderbuffer(ctx, 0); assert(fb->Attachment[BUFFER_AUX0 + i].Renderbuffer == NULL); if (!rb) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating aux buffer"); return GL_FALSE; } assert (colorBits <= 8); rb->Format = MESA_FORMAT_RGBA8888; rb->InternalFormat = GL_RGBA; rb->AllocStorage = _mesa_soft_renderbuffer_storage; _mesa_add_renderbuffer(fb, BUFFER_AUX0 + i, rb); } return GL_TRUE; } /** * Create/attach software-based renderbuffers to the given framebuffer. * This is a helper routine for device drivers. Drivers can just as well * call the individual _mesa_add_*_renderbuffer() routines directly. */ void _mesa_add_soft_renderbuffers(struct gl_framebuffer *fb, GLboolean color, GLboolean depth, GLboolean stencil, GLboolean accum, GLboolean alpha, GLboolean aux) { GLboolean frontLeft = GL_TRUE; GLboolean backLeft = fb->Visual.doubleBufferMode; GLboolean frontRight = fb->Visual.stereoMode; GLboolean backRight = fb->Visual.stereoMode && fb->Visual.doubleBufferMode; if (color) { assert(fb->Visual.redBits == fb->Visual.greenBits); assert(fb->Visual.redBits == fb->Visual.blueBits); _mesa_add_color_renderbuffers(NULL, fb, fb->Visual.redBits, fb->Visual.alphaBits, frontLeft, backLeft, frontRight, backRight); } if (depth) { assert(fb->Visual.depthBits > 0); _mesa_add_depth_renderbuffer(NULL, fb, fb->Visual.depthBits); } if (stencil) { assert(fb->Visual.stencilBits > 0); _mesa_add_stencil_renderbuffer(NULL, fb, fb->Visual.stencilBits); } if (accum) { assert(fb->Visual.accumRedBits > 0); assert(fb->Visual.accumGreenBits > 0); assert(fb->Visual.accumBlueBits > 0); _mesa_add_accum_renderbuffer(NULL, fb, fb->Visual.accumRedBits, fb->Visual.accumGreenBits, fb->Visual.accumBlueBits, fb->Visual.accumAlphaBits); } if (aux) { assert(fb->Visual.numAuxBuffers > 0); _mesa_add_aux_renderbuffers(NULL, fb, fb->Visual.redBits, fb->Visual.numAuxBuffers); } if (alpha) { assert(fb->Visual.alphaBits > 0); _mesa_add_alpha_renderbuffers(NULL, fb, fb->Visual.alphaBits, frontLeft, backLeft, frontRight, backRight); } #if 0 if (multisample) { /* maybe someday */ } #endif } /** * Attach a renderbuffer to a framebuffer. * \param bufferName one of the BUFFER_x tokens */ void _mesa_add_renderbuffer(struct gl_framebuffer *fb, gl_buffer_index bufferName, struct gl_renderbuffer *rb) { assert(fb); assert(rb); assert(bufferName < BUFFER_COUNT); /* There should be no previous renderbuffer on this attachment point, * with the exception of depth/stencil since the same renderbuffer may * be used for both. */ assert(bufferName == BUFFER_DEPTH || bufferName == BUFFER_STENCIL || fb->Attachment[bufferName].Renderbuffer == NULL); /* winsys vs. user-created buffer cross check */ if (fb->Name) { assert(rb->Name); } else { assert(!rb->Name); } fb->Attachment[bufferName].Type = GL_RENDERBUFFER_EXT; fb->Attachment[bufferName].Complete = GL_TRUE; _mesa_reference_renderbuffer(&fb->Attachment[bufferName].Renderbuffer, rb); } /** * Remove the named renderbuffer from the given framebuffer. * \param bufferName one of the BUFFER_x tokens */ void _mesa_remove_renderbuffer(struct gl_framebuffer *fb, gl_buffer_index bufferName) { struct gl_renderbuffer *rb; assert(bufferName < BUFFER_COUNT); rb = fb->Attachment[bufferName].Renderbuffer; if (!rb) return; _mesa_reference_renderbuffer(&rb, NULL); fb->Attachment[bufferName].Renderbuffer = NULL; } /** * Set *ptr to point to rb. If *ptr points to another renderbuffer, * dereference that buffer first. The new renderbuffer's refcount will * be incremented. The old renderbuffer's refcount will be decremented. */ void _mesa_reference_renderbuffer(struct gl_renderbuffer **ptr, struct gl_renderbuffer *rb) { assert(ptr); if (*ptr == rb) { /* no change */ return; } if (*ptr) { /* Unreference the old renderbuffer */ GLboolean deleteFlag = GL_FALSE; struct gl_renderbuffer *oldRb = *ptr; _glthread_LOCK_MUTEX(oldRb->Mutex); ASSERT(oldRb->RefCount > 0); oldRb->RefCount--; /*printf("RB DECR %p (%d) to %d\n", (void*) oldRb, oldRb->Name, oldRb->RefCount);*/ deleteFlag = (oldRb->RefCount == 0); _glthread_UNLOCK_MUTEX(oldRb->Mutex); if (deleteFlag) { oldRb->Delete(oldRb); } *ptr = NULL; } assert(!*ptr); if (rb) { /* reference new renderbuffer */ _glthread_LOCK_MUTEX(rb->Mutex); rb->RefCount++; /*printf("RB INCR %p (%d) to %d\n", (void*) rb, rb->Name, rb->RefCount);*/ _glthread_UNLOCK_MUTEX(rb->Mutex); *ptr = rb; } } /** * Create a new combined depth/stencil renderbuffer for implementing * the GL_EXT_packed_depth_stencil extension. * \return new depth/stencil renderbuffer */ struct gl_renderbuffer * _mesa_new_depthstencil_renderbuffer(struct gl_context *ctx, GLuint name) { struct gl_renderbuffer *dsrb; dsrb = _mesa_new_renderbuffer(ctx, name); if (!dsrb) return NULL; /* init fields not covered by _mesa_new_renderbuffer() */ dsrb->InternalFormat = GL_DEPTH24_STENCIL8_EXT; dsrb->Format = MESA_FORMAT_Z24_S8; dsrb->AllocStorage = _mesa_soft_renderbuffer_storage; return dsrb; }