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-rw-r--r--src/mesa/main/image.c160
-rw-r--r--src/mesa/main/image.h8
2 files changed, 153 insertions, 15 deletions
diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
index d86c2203a81..f79f4023886 100644
--- a/src/mesa/main/image.c
+++ b/src/mesa/main/image.c
@@ -1,6 +1,6 @@
/*
* Mesa 3-D graphics library
- * Version: 6.5.1
+ * Version: 6.5.2
*
* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
*
@@ -4243,11 +4243,127 @@ _mesa_unpack_image( GLuint dimensions,
#endif /* _HAVE_FULL_GL */
+
+/**
+ * Convert an array of RGBA colors from one datatype to another.
+ * NOTE: we assume that src may equal dst.
+ */
+void
+_mesa_convert_colors(GLenum srcType, const GLvoid *src,
+ GLenum dstType, GLvoid *dst,
+ GLuint count, const GLubyte mask[])
+{
+ ASSERT(srcType != dstType);
+
+ switch (srcType) {
+ case GL_UNSIGNED_BYTE:
+ if (dstType == GL_UNSIGNED_SHORT) {
+ const GLubyte (*rgba1)[4] = (const GLubyte (*)[4]) src;
+ GLushort newVals[MAX_WIDTH][4];
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ newVals[i][RCOMP] = UBYTE_TO_USHORT(rgba1[i][RCOMP]);
+ newVals[i][GCOMP] = UBYTE_TO_USHORT(rgba1[i][GCOMP]);
+ newVals[i][BCOMP] = UBYTE_TO_USHORT(rgba1[i][BCOMP]);
+ newVals[i][ACOMP] = UBYTE_TO_USHORT(rgba1[i][ACOMP]);
+ }
+ }
+ _mesa_memcpy(dst, newVals, count * 4 * sizeof(GLushort));
+ }
+ else {
+ const GLubyte (*rgba1)[4] = (const GLubyte (*)[4]) src;
+ GLfloat newVals[MAX_WIDTH][4];
+ GLuint i;
+ ASSERT(dstType == GL_FLOAT);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ newVals[i][RCOMP] = UBYTE_TO_FLOAT(rgba1[i][RCOMP]);
+ newVals[i][GCOMP] = UBYTE_TO_FLOAT(rgba1[i][GCOMP]);
+ newVals[i][BCOMP] = UBYTE_TO_FLOAT(rgba1[i][BCOMP]);
+ newVals[i][ACOMP] = UBYTE_TO_FLOAT(rgba1[i][ACOMP]);
+ }
+ }
+ _mesa_memcpy(dst, newVals, count * 4 * sizeof(GLfloat));
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ if (dstType == GL_UNSIGNED_BYTE) {
+ const GLushort (*rgba2)[4] = (const GLushort (*)[4]) src;
+ GLubyte newVals[MAX_WIDTH][4];
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ newVals[i][RCOMP] = USHORT_TO_UBYTE(rgba2[i][RCOMP]);
+ newVals[i][GCOMP] = USHORT_TO_UBYTE(rgba2[i][GCOMP]);
+ newVals[i][BCOMP] = USHORT_TO_UBYTE(rgba2[i][BCOMP]);
+ newVals[i][ACOMP] = USHORT_TO_UBYTE(rgba2[i][ACOMP]);
+ }
+ }
+ _mesa_memcpy(dst, newVals, count * 4 * sizeof(GLubyte));
+ }
+ else {
+ const GLushort (*rgba2)[4] = (const GLushort (*)[4]) src;
+ GLfloat newVals[MAX_WIDTH][4];
+ GLuint i;
+ ASSERT(dstType == GL_FLOAT);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ newVals[i][RCOMP] = USHORT_TO_FLOAT(rgba2[i][RCOMP]);
+ newVals[i][GCOMP] = USHORT_TO_FLOAT(rgba2[i][GCOMP]);
+ newVals[i][BCOMP] = USHORT_TO_FLOAT(rgba2[i][BCOMP]);
+ newVals[i][ACOMP] = USHORT_TO_FLOAT(rgba2[i][ACOMP]);
+ }
+ }
+ _mesa_memcpy(dst, newVals, count * 4 * sizeof(GLfloat));
+ }
+ break;
+ case GL_FLOAT:
+ if (dstType == GL_UNSIGNED_BYTE) {
+ const GLfloat (*rgba4)[4] = (const GLfloat (*)[4]) src;
+ GLubyte newVals[MAX_WIDTH][4];
+ GLuint i;
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ UNCLAMPED_FLOAT_TO_UBYTE(newVals[i][RCOMP], rgba4[i][RCOMP]);
+ UNCLAMPED_FLOAT_TO_UBYTE(newVals[i][GCOMP], rgba4[i][GCOMP]);
+ UNCLAMPED_FLOAT_TO_UBYTE(newVals[i][BCOMP], rgba4[i][BCOMP]);
+ UNCLAMPED_FLOAT_TO_UBYTE(newVals[i][ACOMP], rgba4[i][ACOMP]);
+ }
+ }
+ _mesa_memcpy(dst, newVals, count * 4 * sizeof(GLubyte));
+ }
+ else {
+ const GLfloat (*rgba4)[4] = (const GLfloat (*)[4]) src;
+ GLushort newVals[MAX_WIDTH][4];
+ GLuint i;
+ ASSERT(dstType == GL_UNSIGNED_SHORT);
+ for (i = 0; i < count; i++) {
+ if (!mask || mask[i]) {
+ UNCLAMPED_FLOAT_TO_USHORT(newVals[i][RCOMP], rgba4[i][RCOMP]);
+ UNCLAMPED_FLOAT_TO_USHORT(newVals[i][GCOMP], rgba4[i][GCOMP]);
+ UNCLAMPED_FLOAT_TO_USHORT(newVals[i][BCOMP], rgba4[i][BCOMP]);
+ UNCLAMPED_FLOAT_TO_USHORT(newVals[i][ACOMP], rgba4[i][ACOMP]);
+ }
+ }
+ _mesa_memcpy(dst, newVals, count * 4 * sizeof(GLushort));
+ }
+ break;
+ default:
+ _mesa_problem(NULL, "Invalid datatype in _mesa_convert_colors");
+ }
+}
+
+
+
+
/**
- * Perform clipping for glDrawPixels. The image's window position
- * and size, and the unpack SkipPixels and SkipRows are adjusted so
- * that the image region is entirely within the window and scissor bounds.
- * NOTE: this will only work when glPixelZoom is (1, 1).
+ * Perform basic clipping for glDrawPixels. The image's position and size
+ * and the unpack SkipPixels and SkipRows are adjusted so that the image
+ * region is entirely within the window and scissor bounds.
+ * NOTE: this will only work when glPixelZoom is (1, 1) or (1, -1).
+ * If Pixel.ZoomY is -1, *destY will be changed to be the first row which
+ * we'll actually write. Beforehand, *destY-1 is the first drawing row.
*
* \return GL_TRUE if image is ready for drawing or
* GL_FALSE if image was completely clipped away (draw nothing)
@@ -4264,7 +4380,8 @@ _mesa_clip_drawpixels(const GLcontext *ctx,
unpack->RowLength = *width;
}
- ASSERT(ctx->Pixel.ZoomX == 1.0F && ctx->Pixel.ZoomY == 1.0F);
+ ASSERT(ctx->Pixel.ZoomX == 1.0F);
+ ASSERT(ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F);
/* left clipping */
if (*destX < buffer->_Xmin) {
@@ -4279,15 +4396,30 @@ _mesa_clip_drawpixels(const GLcontext *ctx,
if (*width <= 0)
return GL_FALSE;
- /* bottom clipping */
- if (*destY < buffer->_Ymin) {
- unpack->SkipRows += (buffer->_Ymin - *destY);
- *height -= (buffer->_Ymin - *destY);
- *destY = buffer->_Ymin;
+ if (ctx->Pixel.ZoomY == 1.0F) {
+ /* bottom clipping */
+ if (*destY < buffer->_Ymin) {
+ unpack->SkipRows += (buffer->_Ymin - *destY);
+ *height -= (buffer->_Ymin - *destY);
+ *destY = buffer->_Ymin;
+ }
+ /* top clipping */
+ if (*destY + *height > buffer->_Ymax)
+ *height -= (*destY + *height - buffer->_Ymax);
+ }
+ else { /* upside down */
+ /* top clipping */
+ if (*destY > buffer->_Ymax) {
+ unpack->SkipRows += (*destY - buffer->_Ymax);
+ *height -= (*destY - buffer->_Ymax);
+ *destY = buffer->_Ymax;
+ }
+ /* bottom clipping */
+ if (*destY - *height < buffer->_Ymin)
+ *height -= (buffer->_Ymin - (*destY - *height));
+ /* adjust destY so it's the first row to write to */
+ (*destY)--;
}
- /* top clipping */
- if (*destY + *height > buffer->_Ymax)
- *height -= (*destY + *height - buffer->_Ymax);
if (*height <= 0)
return GL_TRUE;
diff --git a/src/mesa/main/image.h b/src/mesa/main/image.h
index 84faa03255e..50b79f721e3 100644
--- a/src/mesa/main/image.h
+++ b/src/mesa/main/image.h
@@ -1,6 +1,6 @@
/*
* Mesa 3-D graphics library
- * Version: 6.5
+ * Version: 6.5.2
*
* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
*
@@ -203,6 +203,12 @@ _mesa_unpack_image( GLuint dimensions,
const struct gl_pixelstore_attrib *unpack );
+extern void
+_mesa_convert_colors(GLenum srcType, const GLvoid *src,
+ GLenum dstType, GLvoid *dst,
+ GLuint count, const GLubyte mask[]);
+
+
extern GLboolean
_mesa_clip_drawpixels(const GLcontext *ctx,
GLint *destX, GLint *destY,
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 04:37:43 +0000