summaryrefslogtreecommitdiff
path: root/src/mesa/main/image.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/mesa/main/image.c')
-rw-r--r--src/mesa/main/image.c283
1 files changed, 171 insertions, 112 deletions
diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
index 394a7c65cd..e2e7f806ab 100644
--- a/src/mesa/main/image.c
+++ b/src/mesa/main/image.c
@@ -1,6 +1,6 @@
/*
* Mesa 3-D graphics library
- * Version: 6.5.3
+ * Version: 7.1
*
* Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
*
@@ -64,27 +64,27 @@
*/
static GLboolean
_mesa_type_is_packed(GLenum type)
- {
- switch (type) {
- case GL_UNSIGNED_BYTE_3_3_2:
- case GL_UNSIGNED_BYTE_2_3_3_REV:
- case GL_UNSIGNED_SHORT_5_6_5:
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- case GL_UNSIGNED_SHORT_4_4_4_4:
- case GL_UNSIGNED_SHORT_4_4_4_4_REV:
- case GL_UNSIGNED_SHORT_5_5_5_1:
- case GL_UNSIGNED_SHORT_1_5_5_5_REV:
- case GL_UNSIGNED_INT_8_8_8_8:
- case GL_UNSIGNED_INT_8_8_8_8_REV:
- case GL_UNSIGNED_INT_10_10_10_2:
- case GL_UNSIGNED_INT_2_10_10_10_REV:
- case GL_UNSIGNED_SHORT_8_8_MESA:
- case GL_UNSIGNED_SHORT_8_8_REV_MESA:
- case GL_UNSIGNED_INT_24_8_EXT:
- return GL_TRUE;
- }
+{
+ switch (type) {
+ case GL_UNSIGNED_BYTE_3_3_2:
+ case GL_UNSIGNED_BYTE_2_3_3_REV:
+ case GL_UNSIGNED_SHORT_5_6_5:
+ case GL_UNSIGNED_SHORT_5_6_5_REV:
+ case GL_UNSIGNED_SHORT_4_4_4_4:
+ case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+ case GL_UNSIGNED_SHORT_5_5_5_1:
+ case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+ case GL_UNSIGNED_INT_8_8_8_8:
+ case GL_UNSIGNED_INT_8_8_8_8_REV:
+ case GL_UNSIGNED_INT_10_10_10_2:
+ case GL_UNSIGNED_INT_2_10_10_10_REV:
+ case GL_UNSIGNED_SHORT_8_8_MESA:
+ case GL_UNSIGNED_SHORT_8_8_REV_MESA:
+ case GL_UNSIGNED_INT_24_8_EXT:
+ return GL_TRUE;
+ }
- return GL_FALSE;
+ return GL_FALSE;
}
/**
@@ -103,9 +103,8 @@ _mesa_type_is_packed(GLenum type)
static void
flip_bytes( GLubyte *p, GLuint n )
{
- register GLuint i, a, b;
-
- for (i=0;i<n;i++) {
+ GLuint i, a, b;
+ for (i = 0; i < n; i++) {
b = (GLuint) p[i]; /* words are often faster than bytes */
a = ((b & 0x01) << 7) |
((b & 0x02) << 5) |
@@ -129,9 +128,8 @@ flip_bytes( GLubyte *p, GLuint n )
void
_mesa_swap2( GLushort *p, GLuint n )
{
- register GLuint i;
-
- for (i=0;i<n;i++) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
p[i] = (p[i] >> 8) | ((p[i] << 8) & 0xff00);
}
}
@@ -144,9 +142,8 @@ _mesa_swap2( GLushort *p, GLuint n )
void
_mesa_swap4( GLuint *p, GLuint n )
{
- register GLuint i, a, b;
-
- for (i=0;i<n;i++) {
+ GLuint i, a, b;
+ for (i = 0; i < n; i++) {
b = p[i];
a = (b >> 24)
| ((b >> 8) & 0xff00)
@@ -955,8 +952,8 @@ _mesa_pack_bitmap( GLint width, GLint height, const GLubyte *source,
/* handling SkipPixels is a bit tricky (no pun intended!) */
GLint i;
if (packing->LsbFirst) {
- GLubyte srcMask = 1 << (packing->SkipPixels & 0x7);
- GLubyte dstMask = 128;
+ GLubyte srcMask = 128;
+ GLubyte dstMask = 1 << (packing->SkipPixels & 0x7);
const GLubyte *s = src;
GLubyte *d = dst;
*d = 0;
@@ -982,8 +979,8 @@ _mesa_pack_bitmap( GLint width, GLint height, const GLubyte *source,
}
}
else {
- GLubyte srcMask = 128 >> (packing->SkipPixels & 0x7);
- GLubyte dstMask = 128;
+ GLubyte srcMask = 128;
+ GLubyte dstMask = 128 >> (packing->SkipPixels & 0x7);
const GLubyte *s = src;
GLubyte *d = dst;
*d = 0;
@@ -3881,7 +3878,7 @@ _mesa_pack_stencil_span( const GLcontext *ctx, GLuint n,
SWAP4BYTE(value); \
} \
} \
- depthValues[i] = CLAMP(GLTYPE2FLOAT(value), 0.0F, 1.0F); \
+ depthValues[i] = GLTYPE2FLOAT(value); \
} \
} while (0)
@@ -3892,6 +3889,37 @@ _mesa_unpack_depth_span( const GLcontext *ctx, GLuint n,
const struct gl_pixelstore_attrib *srcPacking )
{
GLfloat depthTemp[MAX_WIDTH], *depthValues;
+ GLboolean needClamp = GL_FALSE;
+
+ /* Look for special cases first.
+ * Not only are these faster, they're less prone to numeric conversion
+ * problems. Otherwise, converting from an int type to a float then
+ * back to an int type can introduce errors that will show up as
+ * artifacts in things like depth peeling which uses glCopyTexImage.
+ */
+ if (ctx->Pixel.DepthScale == 1.0 && ctx->Pixel.DepthBias == 0.0) {
+ if (srcType == GL_UNSIGNED_INT && dstType == GL_UNSIGNED_SHORT) {
+ const GLuint *src = (const GLuint *) source;
+ GLushort *dst = (GLushort *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = src[i] >> 16;
+ }
+ return;
+ }
+ if (srcType == GL_UNSIGNED_SHORT && dstType == GL_UNSIGNED_INT) {
+ const GLushort *src = (const GLushort *) source;
+ GLuint *dst = (GLuint *) dest;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ dst[i] = src[i] | (src[i] << 16);
+ }
+ return;
+ }
+ /* XXX may want to add additional cases here someday */
+ }
+
+ /* general case path follows */
if (dstType == GL_FLOAT) {
depthValues = (GLfloat *) dest;
@@ -3900,28 +3928,31 @@ _mesa_unpack_depth_span( const GLcontext *ctx, GLuint n,
depthValues = depthTemp;
}
- /* XXX we need to obey srcPacking->SwapBytes here!!! */
- (void) srcPacking;
-
+ /* Convert incoming values to GLfloat. Some conversions will require
+ * clamping, below.
+ */
switch (srcType) {
case GL_BYTE:
- DEPTH_VALUES(GLbyte, BYTE_TO_FLOAT);
- break;
+ DEPTH_VALUES(GLbyte, BYTE_TO_FLOAT);
+ needClamp = GL_TRUE;
+ break;
case GL_UNSIGNED_BYTE:
- DEPTH_VALUES(GLubyte, UBYTE_TO_FLOAT);
- break;
+ DEPTH_VALUES(GLubyte, UBYTE_TO_FLOAT);
+ break;
case GL_SHORT:
- DEPTH_VALUES(GLshort, SHORT_TO_FLOAT);
- break;
+ DEPTH_VALUES(GLshort, SHORT_TO_FLOAT);
+ needClamp = GL_TRUE;
+ break;
case GL_UNSIGNED_SHORT:
- DEPTH_VALUES(GLushort, USHORT_TO_FLOAT);
- break;
+ DEPTH_VALUES(GLushort, USHORT_TO_FLOAT);
+ break;
case GL_INT:
- DEPTH_VALUES(GLint, INT_TO_FLOAT);
- break;
+ DEPTH_VALUES(GLint, INT_TO_FLOAT);
+ needClamp = GL_TRUE;
+ break;
case GL_UNSIGNED_INT:
- DEPTH_VALUES(GLuint, UINT_TO_FLOAT);
- break;
+ DEPTH_VALUES(GLuint, UINT_TO_FLOAT);
+ break;
case GL_UNSIGNED_INT_24_8_EXT: /* GL_EXT_packed_depth_stencil */
if (dstType == GL_UNSIGNED_INT &&
depthScale == (GLfloat) 0xffffff &&
@@ -3953,19 +3984,21 @@ _mesa_unpack_depth_span( const GLcontext *ctx, GLuint n,
}
break;
case GL_FLOAT:
- DEPTH_VALUES(GLfloat, 1*);
- break;
+ DEPTH_VALUES(GLfloat, 1*);
+ needClamp = GL_TRUE;
+ break;
case GL_HALF_FLOAT_ARB:
{
GLuint i;
const GLhalfARB *src = (const GLhalfARB *) source;
for (i = 0; i < n; i++) {
- GLhalfARB value = src[i];
- if (srcPacking->SwapBytes) {
- SWAP2BYTE(value);
- }
+ GLhalfARB value = src[i];
+ if (srcPacking->SwapBytes) {
+ SWAP2BYTE(value);
+ }
depthValues[i] = _mesa_half_to_float(value);
}
+ needClamp = GL_TRUE;
}
break;
default:
@@ -3973,12 +4006,30 @@ _mesa_unpack_depth_span( const GLcontext *ctx, GLuint n,
return;
}
+ /* apply depth scale and bias */
+ {
+ const GLfloat scale = ctx->Pixel.DepthScale;
+ const GLfloat bias = ctx->Pixel.DepthBias;
+ if (scale != 1.0 || bias != 0.0) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ depthValues[i] = depthValues[i] * scale + bias;
+ }
+ needClamp = GL_TRUE;
+ }
+ }
- /* apply depth scale and bias and clamp to [0,1] */
- if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) {
- _mesa_scale_and_bias_depth(ctx, n, depthValues);
+ /* clamp to [0, 1] */
+ if (needClamp) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ depthValues[i] = CLAMP(depthValues[i], 0.0, 1.0);
+ }
}
+ /*
+ * Convert values to dstType
+ */
if (dstType == GL_UNSIGNED_INT) {
GLuint *zValues = (GLuint *) dest;
GLuint i;
@@ -4232,60 +4283,68 @@ _mesa_unpack_image( GLuint dimensions,
const GLvoid *src = _mesa_image_address(dimensions, unpack, pixels,
width, height, format, type, img, row, 0);
- if ((type == GL_BITMAP) && (unpack->SkipPixels & 0x7)) {
- GLint i;
- flipBytes = GL_FALSE;
- if (unpack->LsbFirst) {
- GLubyte srcMask = 1 << (unpack->SkipPixels & 0x7);
- GLubyte dstMask = 128;
- const GLubyte *s = src;
- GLubyte *d = dst;
- *d = 0;
- for (i = 0; i < width; i++) {
- if (*s & srcMask) {
- *d |= dstMask;
- }
- if (srcMask == 128) {
- srcMask = 1;
- s++;
- } else {
- srcMask = srcMask << 1;
- }
- if (dstMask == 1) {
- dstMask = 128;
- d++;
- *d = 0;
- } else {
- dstMask = dstMask >> 1;
- }
- }
- } else {
- GLubyte srcMask = 128 >> (unpack->SkipPixels & 0x7);
- GLubyte dstMask = 128;
- const GLubyte *s = src;
- GLubyte *d = dst;
+ if ((type == GL_BITMAP) && (unpack->SkipPixels & 0x7)) {
+ GLint i;
+ flipBytes = GL_FALSE;
+ if (unpack->LsbFirst) {
+ GLubyte srcMask = 1 << (unpack->SkipPixels & 0x7);
+ GLubyte dstMask = 128;
+ const GLubyte *s = src;
+ GLubyte *d = dst;
+ *d = 0;
+ for (i = 0; i < width; i++) {
+ if (*s & srcMask) {
+ *d |= dstMask;
+ }
+ if (srcMask == 128) {
+ srcMask = 1;
+ s++;
+ }
+ else {
+ srcMask = srcMask << 1;
+ }
+ if (dstMask == 1) {
+ dstMask = 128;
+ d++;
+ *d = 0;
+ }
+ else {
+ dstMask = dstMask >> 1;
+ }
+ }
+ }
+ else {
+ GLubyte srcMask = 128 >> (unpack->SkipPixels & 0x7);
+ GLubyte dstMask = 128;
+ const GLubyte *s = src;
+ GLubyte *d = dst;
+ *d = 0;
+ for (i = 0; i < width; i++) {
+ if (*s & srcMask) {
+ *d |= dstMask;
+ }
+ if (srcMask == 1) {
+ srcMask = 128;
+ s++;
+ }
+ else {
+ srcMask = srcMask >> 1;
+ }
+ if (dstMask == 1) {
+ dstMask = 128;
+ d++;
*d = 0;
- for (i = 0; i < width; i++) {
- if (*s & srcMask) {
- *d |= dstMask;
- }
- if (srcMask == 1) {
- srcMask = 128;
- s++;
- } else {
- srcMask = srcMask >> 1;
- }
- if (dstMask == 1) {
- dstMask = 128;
- d++;
- *d = 0;
- } else {
- dstMask = dstMask >> 1;
- }
- }
- }
- } else
- _mesa_memcpy(dst, src, bytesPerRow);
+ }
+ else {
+ dstMask = dstMask >> 1;
+ }
+ }
+ }
+ }
+ else {
+ _mesa_memcpy(dst, src, bytesPerRow);
+ }
+
/* byte flipping/swapping */
if (flipBytes) {
flip_bytes((GLubyte *) dst, bytesPerRow);
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-15 05:29:53 +0000