diff options
Diffstat (limited to 'src/mesa/drivers/glide/fxdd.c')
| -rw-r--r-- | src/mesa/drivers/glide/fxdd.c | 222 |
1 files changed, 216 insertions, 6 deletions
diff --git a/src/mesa/drivers/glide/fxdd.c b/src/mesa/drivers/glide/fxdd.c index f20b1147f8e..81d3754e42e 100644 --- a/src/mesa/drivers/glide/fxdd.c +++ b/src/mesa/drivers/glide/fxdd.c @@ -1,4 +1,8 @@ -/* $Id: fxdd.c,v 1.97 2003/06/16 14:30:57 brianp Exp $ */ +/* Hack alert: + * fxDDReadPixels888 does not convert 8A8R8G8B into 5R5G5B + */ + +/* $Id: fxdd.c,v 1.98 2003/07/17 14:50:12 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -66,6 +70,14 @@ GLubyte FX_PixelToR[0x10000]; GLubyte FX_PixelToG[0x10000]; GLubyte FX_PixelToB[0x10000]; +/* lookup table for scaling 5 bit colors up to 8 bits */ +GLuint FX_rgb_scale_5[32] = { + 0, 8, 16, 25, 33, 41, 49, 58, + 66, 74, 82, 90, 99, 107, 115, 123, + 132, 140, 148, 156, 165, 173, 181, 189, + 197, 206, 214, 222, 230, 239, 247, 255 +}; + /* * Initialize the FX_PixelTo{RGB} arrays. @@ -89,9 +101,10 @@ fxInitPixelTables(fxMesaContext fxMesa, GLboolean bgrOrder) g = (pixel & 0x07E0) >> 3; b = (pixel & 0x001F) << 3; } - r = r * 255 / 0xF8; /* fill in low-order bits */ - g = g * 255 / 0xFC; - b = b * 255 / 0xF8; + /* fill in low-order bits with proper rounding */ + r = (GLuint)(((double)r * 255. / 0xF8) + 0.5); + g = (GLuint)(((double)g * 255. / 0xFC) + 0.5); + b = (GLuint)(((double)b * 255. / 0xF8) + 0.5); FX_PixelToR[pixel] = r; FX_PixelToG[pixel] = g; FX_PixelToB[pixel] = b; @@ -581,6 +594,190 @@ fxDDReadPixels(GLcontext * ctx, GLint x, GLint y, } } +static void fxDDReadPixels555 (GLcontext * ctx, + GLint x, GLint y, + GLsizei width, GLsizei height, + GLenum format, GLenum type, + const struct gl_pixelstore_attrib *packing, + GLvoid *dstImage) +{ + if (ctx->_ImageTransferState) { + _swrast_ReadPixels(ctx, x, y, width, height, format, type, + packing, dstImage); + return; + } + else { + fxMesaContext fxMesa = (fxMesaContext) ctx->DriverCtx; + GrLfbInfo_t info; + + BEGIN_BOARD_LOCK(); + if (grLfbLock(GR_LFB_READ_ONLY, + fxMesa->currentFB, + GR_LFBWRITEMODE_ANY, + GR_ORIGIN_UPPER_LEFT, FXFALSE, &info)) { + const GLint winX = 0; + const GLint winY = fxMesa->height - 1; + const GLint srcStride = info.strideInBytes / 2; /* stride in GLushorts */ + const GLushort *src = (const GLushort *) info.lfbPtr + + (winY - y) * srcStride + (winX + x); + GLubyte *dst = (GLubyte *) _mesa_image_address(packing, dstImage, + width, height, format, + type, 0, 0, 0); + GLint dstStride = + _mesa_image_row_stride(packing, width, format, type); + + if (format == GL_RGB && type == GL_UNSIGNED_BYTE) { + /* convert 5R5G5B into 8R8G8B */ + GLint row, col; + const GLint halfWidth = width >> 1; + const GLint extraPixel = (width & 1); + for (row = 0; row < height; row++) { + GLubyte *d = dst; + for (col = 0; col < halfWidth; col++) { + const GLuint pixel = ((const GLuint *) src)[col]; + *d++ = FX_rgb_scale_5[ pixel & 0x1f]; + *d++ = FX_rgb_scale_5[(pixel >> 5) & 0x1f]; + *d++ = FX_rgb_scale_5[(pixel >> 10) & 0x1f]; + *d++ = FX_rgb_scale_5[(pixel >> 16) & 0x1f]; + *d++ = FX_rgb_scale_5[(pixel >> 21) & 0x1f]; + *d++ = FX_rgb_scale_5[(pixel >> 26) & 0x1f]; + } + if (extraPixel) { + GLushort pixel = src[width - 1]; + *d++ = FX_rgb_scale_5[ pixel & 0x1f]; + *d++ = FX_rgb_scale_5[(pixel >> 5) & 0x1f]; + *d++ = FX_rgb_scale_5[(pixel >> 10) & 0x1f]; + } + dst += dstStride; + src -= srcStride; + } + } + else if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) { + /* convert 5R6G5B into 8R8G8B8A */ + GLint row, col; + const GLint halfWidth = width >> 1; + const GLint extraPixel = (width & 1); + for (row = 0; row < height; row++) { + GLubyte *d = dst; + for (col = 0; col < halfWidth; col++) { + const GLuint pixel = ((const GLuint *) src)[col]; + *d++ = FX_rgb_scale_5[ pixel & 0x1f]; + *d++ = FX_rgb_scale_5[(pixel >> 5) & 0x1f]; + *d++ = FX_rgb_scale_5[(pixel >> 10) & 0x1f]; + *d++ = (pixel & 0x8000) ? 255 : 0; + *d++ = FX_rgb_scale_5[(pixel >> 16) & 0x1f]; + *d++ = FX_rgb_scale_5[(pixel >> 21) & 0x1f]; + *d++ = FX_rgb_scale_5[(pixel >> 26) & 0x1f]; + *d++ = (pixel & 0x80000000) ? 255 : 0; + } + if (extraPixel) { + const GLushort pixel = src[width - 1]; + *d++ = FX_rgb_scale_5[ pixel & 0x1f]; + *d++ = FX_rgb_scale_5[(pixel >> 5) & 0x1f]; + *d++ = FX_rgb_scale_5[(pixel >> 10) & 0x1f]; + *d++ = (pixel & 0x8000) ? 255 : 0; + } + dst += dstStride; + src -= srcStride; + } + } + else if (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) { + /* directly memcpy 5R5G5B pixels into client's buffer */ + const GLint widthInBytes = width * 2; + GLint row; + for (row = 0; row < height; row++) { + MEMCPY(dst, src, widthInBytes); + dst += dstStride; + src -= srcStride; + } + } + else { + grLfbUnlock(GR_LFB_READ_ONLY, fxMesa->currentFB); + END_BOARD_LOCK(); + _swrast_ReadPixels(ctx, x, y, width, height, format, type, + packing, dstImage); + return; + } + + grLfbUnlock(GR_LFB_READ_ONLY, fxMesa->currentFB); + } + END_BOARD_LOCK(); + } +} + +static void fxDDReadPixels888 (GLcontext * ctx, + GLint x, GLint y, + GLsizei width, GLsizei height, + GLenum format, GLenum type, + const struct gl_pixelstore_attrib *packing, + GLvoid *dstImage) +{ + if (ctx->_ImageTransferState) { + _swrast_ReadPixels(ctx, x, y, width, height, format, type, + packing, dstImage); + return; + } + else { + fxMesaContext fxMesa = (fxMesaContext) ctx->DriverCtx; + GrLfbInfo_t info; + + BEGIN_BOARD_LOCK(); + if (grLfbLock(GR_LFB_READ_ONLY, + fxMesa->currentFB, + GR_LFBWRITEMODE_ANY, + GR_ORIGIN_UPPER_LEFT, FXFALSE, &info)) { + const GLint winX = 0; + const GLint winY = fxMesa->height - 1; + const GLint srcStride = info.strideInBytes / 4; /* stride in GLuints */ + const GLuint *src = (const GLuint *) info.lfbPtr + + (winY - y) * srcStride + (winX + x); + GLubyte *dst = (GLubyte *) _mesa_image_address(packing, dstImage, + width, height, format, + type, 0, 0, 0); + GLint dstStride = + _mesa_image_row_stride(packing, width, format, type); + + if (format == GL_RGB && type == GL_UNSIGNED_BYTE) { + /* convert 8A8R8G8B into 8R8G8B */ + GLint row, col; + for (row = 0; row < height; row++) { + GLubyte *d = dst; + for (col = 0; col < width; col++) { + const GLuint pixel = ((const GLuint *) src)[col]; + *d++ = pixel >> 16; + *d++ = pixel >> 8; + *d++ = pixel; + } + dst += dstStride; + src -= srcStride; + } + } + else if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) { + /* directly memcpy 8A8R8G8B pixels into client's buffer */ + const GLint widthInBytes = width * 4; + GLint row; + for (row = 0; row < height; row++) { + MEMCPY(dst, src, widthInBytes); + dst += dstStride; + src -= srcStride; + } + } + else if (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) { + /* convert 8A8R8G8B into 5R5G5B */ + } + else { + grLfbUnlock(GR_LFB_READ_ONLY, fxMesa->currentFB); + END_BOARD_LOCK(); + _swrast_ReadPixels(ctx, x, y, width, height, format, type, + packing, dstImage); + return; + } + + grLfbUnlock(GR_LFB_READ_ONLY, fxMesa->currentFB); + } + END_BOARD_LOCK(); + } +} static void @@ -804,7 +1001,7 @@ fxDDInitExtensions(GLcontext * ctx) { fxMesaContext fxMesa = (fxMesaContext) ctx->DriverCtx; - _mesa_add_extension(ctx, GL_TRUE, "3DFX_set_global_palette", 0); + /*_mesa_add_extension(ctx, GL_TRUE, "3DFX_set_global_palette", 0);*/ _mesa_enable_extension(ctx, "GL_EXT_point_parameters"); _mesa_enable_extension(ctx, "GL_EXT_paletted_texture"); _mesa_enable_extension(ctx, "GL_EXT_texture_lod_bias"); @@ -1009,7 +1206,20 @@ fxSetupDDPointers(GLcontext * ctx) ctx->Driver.Bitmap = fxDDDrawBitmap; ctx->Driver.CopyPixels = _swrast_CopyPixels; ctx->Driver.DrawPixels = _swrast_DrawPixels; - ctx->Driver.ReadPixels = fxDDReadPixels; + { + fxMesaContext fxMesa = (fxMesaContext) ctx->DriverCtx; + switch (fxMesa->colDepth) { + case 15: + ctx->Driver.ReadPixels = fxDDReadPixels555; + break; + case 16: + ctx->Driver.ReadPixels = fxDDReadPixels; + break; + case 32: + ctx->Driver.ReadPixels = fxDDReadPixels888; + break; + } + } ctx->Driver.ResizeBuffers = _swrast_alloc_buffers; ctx->Driver.Finish = fxDDFinish; ctx->Driver.Flush = NULL; |