#include "glheader.h"
#include "colormac.h"
#include "context.h"
+#include "enums.h"
#include "image.h"
#include "imports.h"
#include "macros.h"
-#include "pixel.h"
/**
}
+/**
+ * Test if the given image format is a color/RGBA format (i.e., not color
+ * index, depth, stencil, etc).
+ * \param format the image format value (may by an internal texture format)
+ * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
+ */
+GLboolean
+_mesa_is_color_format(GLenum format)
+{
+ switch (format) {
+ case GL_RED:
+ case GL_GREEN:
+ case GL_BLUE:
+ case GL_ALPHA:
+ case GL_ALPHA4:
+ case GL_ALPHA8:
+ case GL_ALPHA12:
+ case GL_ALPHA16:
+ case 1:
+ case GL_LUMINANCE:
+ case GL_LUMINANCE4:
+ case GL_LUMINANCE8:
+ case GL_LUMINANCE12:
+ case GL_LUMINANCE16:
+ case 2:
+ case GL_LUMINANCE_ALPHA:
+ case GL_LUMINANCE4_ALPHA4:
+ case GL_LUMINANCE6_ALPHA2:
+ case GL_LUMINANCE8_ALPHA8:
+ case GL_LUMINANCE12_ALPHA4:
+ case GL_LUMINANCE12_ALPHA12:
+ case GL_LUMINANCE16_ALPHA16:
+ case GL_INTENSITY:
+ case GL_INTENSITY4:
+ case GL_INTENSITY8:
+ case GL_INTENSITY12:
+ case GL_INTENSITY16:
+ case 3:
+ case GL_RGB:
+ case GL_BGR:
+ case GL_R3_G3_B2:
+ case GL_RGB4:
+ case GL_RGB5:
+ case GL_RGB8:
+ case GL_RGB10:
+ case GL_RGB12:
+ case GL_RGB16:
+ case 4:
+ case GL_ABGR_EXT:
+ case GL_RGBA:
+ case GL_BGRA:
+ case GL_RGBA2:
+ case GL_RGBA4:
+ case GL_RGB5_A1:
+ case GL_RGBA8:
+ case GL_RGB10_A2:
+ case GL_RGBA12:
+ case GL_RGBA16:
+ /* float texture formats */
+ case GL_ALPHA16F_ARB:
+ case GL_ALPHA32F_ARB:
+ case GL_LUMINANCE16F_ARB:
+ case GL_LUMINANCE32F_ARB:
+ case GL_LUMINANCE_ALPHA16F_ARB:
+ case GL_LUMINANCE_ALPHA32F_ARB:
+ case GL_INTENSITY16F_ARB:
+ case GL_INTENSITY32F_ARB:
+ case GL_RGB16F_ARB:
+ case GL_RGB32F_ARB:
+ case GL_RGBA16F_ARB:
+ case GL_RGBA32F_ARB:
+ /* compressed formats */
+ case GL_COMPRESSED_ALPHA:
+ case GL_COMPRESSED_LUMINANCE:
+ case GL_COMPRESSED_LUMINANCE_ALPHA:
+ case GL_COMPRESSED_INTENSITY:
+ case GL_COMPRESSED_RGB:
+ case GL_COMPRESSED_RGBA:
+ case GL_RGB_S3TC:
+ case GL_RGB4_S3TC:
+ case GL_RGBA_S3TC:
+ case GL_RGBA4_S3TC:
+ case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
+ case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
+ case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
+ case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
+ case GL_COMPRESSED_RGB_FXT1_3DFX:
+ case GL_COMPRESSED_RGBA_FXT1_3DFX:
+#if FEATURE_EXT_texture_sRGB
+ case GL_SRGB_EXT:
+ case GL_SRGB8_EXT:
+ case GL_SRGB_ALPHA_EXT:
+ case GL_SRGB8_ALPHA8_EXT:
+ case GL_SLUMINANCE_ALPHA_EXT:
+ case GL_SLUMINANCE8_ALPHA8_EXT:
+ case GL_SLUMINANCE_EXT:
+ case GL_SLUMINANCE8_EXT:
+ case GL_COMPRESSED_SRGB_EXT:
+ case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
+ case GL_COMPRESSED_SRGB_ALPHA_EXT:
+ case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
+ case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
+ case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
+ case GL_COMPRESSED_SLUMINANCE_EXT:
+ case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
+#endif /* FEATURE_EXT_texture_sRGB */
+ return GL_TRUE;
+ /* signed texture formats */
+ case GL_RGBA_SNORM:
+ case GL_RGBA8_SNORM:
+ return GL_TRUE;
+ case GL_YCBCR_MESA: /* not considered to be RGB */
+ /* fall-through */
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Test if the given image format is a color index format.
+ */
+GLboolean
+_mesa_is_index_format(GLenum format)
+{
+ switch (format) {
+ case GL_COLOR_INDEX:
+ case GL_COLOR_INDEX1_EXT:
+ case GL_COLOR_INDEX2_EXT:
+ case GL_COLOR_INDEX4_EXT:
+ case GL_COLOR_INDEX8_EXT:
+ case GL_COLOR_INDEX12_EXT:
+ case GL_COLOR_INDEX16_EXT:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Test if the given image format is a depth component format.
+ */
+GLboolean
+_mesa_is_depth_format(GLenum format)
+{
+ switch (format) {
+ case GL_DEPTH_COMPONENT:
+ case GL_DEPTH_COMPONENT16:
+ case GL_DEPTH_COMPONENT24:
+ case GL_DEPTH_COMPONENT32:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Test if the given image format is a stencil format.
+ */
+GLboolean
+_mesa_is_stencil_format(GLenum format)
+{
+ switch (format) {
+ case GL_STENCIL_INDEX:
+ case GL_DEPTH_STENCIL:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Test if the given image format is a YCbCr format.
+ */
+GLboolean
+_mesa_is_ycbcr_format(GLenum format)
+{
+ switch (format) {
+ case GL_YCBCR_MESA:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Test if the given image format is a depth+stencil format.
+ */
+GLboolean
+_mesa_is_depthstencil_format(GLenum format)
+{
+ switch (format) {
+ case GL_DEPTH24_STENCIL8_EXT:
+ case GL_DEPTH_STENCIL_EXT:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+/**
+ * Test if the given image format is a dudv format.
+ */
+GLboolean
+_mesa_is_dudv_format(GLenum format)
+{
+ switch (format) {
+ case GL_DUDV_ATI:
+ case GL_DU8DV8_ATI:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
/**
* Return the address of a specific pixel in an image (1D, 2D or 3D).
*
| (p[3] );
p += 4;
}
- _mesa_free(ptrn);
+ free(ptrn);
}
}
/* Alloc dest storage */
bytes = ((width + 7) / 8 * height);
- buffer = (GLubyte *) _mesa_malloc( bytes );
+ buffer = (GLubyte *) malloc( bytes );
if (!buffer)
return NULL;
_mesa_image_address2d(packing, pixels, width, height,
GL_COLOR_INDEX, GL_BITMAP, row, 0);
if (!src) {
- _mesa_free(buffer);
+ free(buffer);
return NULL;
}
if ((packing->SkipPixels & 7) == 0) {
- _mesa_memcpy( dst, src, width_in_bytes );
+ memcpy( dst, src, width_in_bytes );
if (packing->LsbFirst) {
flip_bytes( dst, width_in_bytes );
}
return;
if ((packing->SkipPixels & 7) == 0) {
- _mesa_memcpy( dst, src, width_in_bytes );
+ memcpy( dst, src, width_in_bytes );
if (packing->LsbFirst) {
flip_bytes( dst, width_in_bytes );
}
}
+/**
+ * "Expand" a bitmap from 1-bit per pixel to 8-bits per pixel.
+ * This is typically used to convert a bitmap into a GLubyte/pixel texture.
+ * "On" bits will set texels to \p onValue.
+ * "Off" bits will not modify texels.
+ * \param width src bitmap width in pixels
+ * \param height src bitmap height in pixels
+ * \param unpack bitmap unpacking state
+ * \param bitmap the src bitmap data
+ * \param destBuffer start of dest buffer
+ * \param destStride row stride in dest buffer
+ * \param onValue if bit is 1, set destBuffer pixel to this value
+ */
+void
+_mesa_expand_bitmap(GLsizei width, GLsizei height,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLubyte *bitmap,
+ GLubyte *destBuffer, GLint destStride,
+ GLubyte onValue)
+{
+ const GLubyte *srcRow = (const GLubyte *)
+ _mesa_image_address2d(unpack, bitmap, width, height,
+ GL_COLOR_INDEX, GL_BITMAP, 0, 0);
+ const GLint srcStride = _mesa_image_row_stride(unpack, width,
+ GL_COLOR_INDEX, GL_BITMAP);
+ GLint row, col;
+
+#define SET_PIXEL(COL, ROW) \
+ destBuffer[(ROW) * destStride + (COL)] = onValue;
+
+ for (row = 0; row < height; row++) {
+ const GLubyte *src = srcRow;
+
+ if (unpack->LsbFirst) {
+ /* Lsb first */
+ GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
+ for (col = 0; col < width; col++) {
+
+ if (*src & mask) {
+ SET_PIXEL(col, row);
+ }
+
+ if (mask == 128U) {
+ src++;
+ mask = 1U;
+ }
+ else {
+ mask = mask << 1;
+ }
+ }
+
+ /* get ready for next row */
+ if (mask != 1)
+ src++;
+ }
+ else {
+ /* Msb first */
+ GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
+ for (col = 0; col < width; col++) {
+
+ if (*src & mask) {
+ SET_PIXEL(col, row);
+ }
+
+ if (mask == 1U) {
+ src++;
+ mask = 128U;
+ }
+ else {
+ mask = mask >> 1;
+ }
+ }
+
+ /* get ready for next row */
+ if (mask != 128)
+ src++;
+ }
+
+ srcRow += srcStride;
+ } /* row */
+
+#undef SET_PIXEL
+}
+
+
/**********************************************************************/
/***** Pixel processing functions ******/
/**********************************************************************/
srcFormat == GL_RGBA ||
srcFormat == GL_BGRA ||
srcFormat == GL_ABGR_EXT ||
+ srcFormat == GL_DU8DV8_ATI ||
srcFormat == GL_DUDV_ATI);
ASSERT(srcType == GL_UNSIGNED_BYTE ||
aComp = 0;
stride = 4;
break;
+ case GL_DU8DV8_ATI:
case GL_DUDV_ATI:
redIndex = 0;
greenIndex = 1;
stride = 2;
break;
default:
- _mesa_problem(NULL, "bad srcFormat in extract float data");
+ _mesa_problem(NULL, "bad srcFormat %s in extract float data",
+ _mesa_lookup_enum_by_nr(srcFormat));
return;
}
if (srcType == CHAN_TYPE) {
if (dstFormat == GL_RGBA) {
if (srcFormat == GL_RGBA) {
- _mesa_memcpy( dest, source, n * 4 * sizeof(GLchan) );
+ memcpy( dest, source, n * 4 * sizeof(GLchan) );
return;
}
else if (srcFormat == GL_RGB) {
}
else if (dstFormat == GL_RGB) {
if (srcFormat == GL_RGB) {
- _mesa_memcpy( dest, source, n * 3 * sizeof(GLchan) );
+ memcpy( dest, source, n * 3 * sizeof(GLchan) );
return;
}
else if (srcFormat == GL_RGBA) {
else if (dstFormat == srcFormat) {
GLint comps = _mesa_components_in_format(srcFormat);
assert(comps > 0);
- _mesa_memcpy( dest, source, n * comps * sizeof(GLchan) );
+ memcpy( dest, source, n * comps * sizeof(GLchan) );
return;
}
}
*/
if (transferOps == 0 && srcType == GL_UNSIGNED_BYTE
&& dstType == GL_UNSIGNED_BYTE) {
- _mesa_memcpy(dest, source, n * sizeof(GLubyte));
+ memcpy(dest, source, n * sizeof(GLubyte));
}
else if (transferOps == 0 && srcType == GL_UNSIGNED_INT
&& dstType == GL_UNSIGNED_INT && !srcPacking->SwapBytes) {
- _mesa_memcpy(dest, source, n * sizeof(GLuint));
+ memcpy(dest, source, n * sizeof(GLuint));
}
else {
/*
}
break;
case GL_UNSIGNED_INT:
- _mesa_memcpy(dest, indexes, n * sizeof(GLuint));
+ memcpy(dest, indexes, n * sizeof(GLuint));
break;
default:
_mesa_problem(ctx, "bad dstType in _mesa_unpack_index_span");
if (transferOps & (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT)) {
/* make a copy of input */
- _mesa_memcpy(indexes, source, n * sizeof(GLuint));
+ memcpy(indexes, source, n * sizeof(GLuint));
_mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
source = indexes;
}
!ctx->Pixel.MapStencilFlag &&
srcType == GL_UNSIGNED_BYTE &&
dstType == GL_UNSIGNED_BYTE) {
- _mesa_memcpy(dest, source, n * sizeof(GLubyte));
+ memcpy(dest, source, n * sizeof(GLubyte));
}
else if (transferOps == 0 &&
!ctx->Pixel.MapStencilFlag &&
srcType == GL_UNSIGNED_INT &&
dstType == GL_UNSIGNED_INT &&
!srcPacking->SwapBytes) {
- _mesa_memcpy(dest, source, n * sizeof(GLuint));
+ memcpy(dest, source, n * sizeof(GLuint));
}
else {
/*
}
break;
case GL_UNSIGNED_INT:
- _mesa_memcpy(dest, indexes, n * sizeof(GLuint));
+ memcpy(dest, indexes, n * sizeof(GLuint));
break;
default:
_mesa_problem(ctx, "bad dstType in _mesa_unpack_stencil_span");
if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset ||
ctx->Pixel.MapStencilFlag) {
/* make a copy of input */
- _mesa_memcpy(stencil, source, n * sizeof(GLstencil));
+ memcpy(stencil, source, n * sizeof(GLstencil));
_mesa_apply_stencil_transfer_ops(ctx, n, stencil);
source = stencil;
}
switch (dstType) {
case GL_UNSIGNED_BYTE:
if (sizeof(GLstencil) == 1) {
- _mesa_memcpy( dest, source, n );
+ memcpy( dest, source, n );
}
else {
GLubyte *dst = (GLubyte *) dest;
ASSERT(n <= MAX_WIDTH);
if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) {
- _mesa_memcpy(depthCopy, depthSpan, n * sizeof(GLfloat));
+ memcpy(depthCopy, depthSpan, n * sizeof(GLfloat));
_mesa_scale_and_bias_depth(ctx, n, depthCopy);
depthSpan = depthCopy;
}
ASSERT(n <= MAX_WIDTH);
if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) {
- _mesa_memcpy(depthCopy, depthVals, n * sizeof(GLfloat));
+ memcpy(depthCopy, depthVals, n * sizeof(GLfloat));
_mesa_scale_and_bias_depth(ctx, n, depthCopy);
depthVals = depthCopy;
}
if (ctx->Pixel.IndexShift ||
ctx->Pixel.IndexOffset ||
ctx->Pixel.MapStencilFlag) {
- _mesa_memcpy(stencilCopy, stencilVals, n * sizeof(GLstencil));
+ memcpy(stencilCopy, stencilVals, n * sizeof(GLstencil));
_mesa_apply_stencil_transfer_ops(ctx, n, stencilCopy);
stencilVals = stencilCopy;
}
{
GLubyte *destBuffer
- = (GLubyte *) _mesa_malloc(bytesPerRow * height * depth);
+ = (GLubyte *) malloc(bytesPerRow * height * depth);
GLubyte *dst;
GLint img, row;
if (!destBuffer)
}
}
else {
- _mesa_memcpy(dst, src, bytesPerRow);
+ memcpy(dst, src, bytesPerRow);
}
/* byte flipping/swapping */
}
}
if (useTemp)
- _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));
+ memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));
}
else {
const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src;
}
}
if (useTemp)
- _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));
+ memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));
}
break;
case GL_UNSIGNED_SHORT:
}
}
if (useTemp)
- _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
+ memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
}
else {
const GLushort (*src2)[4] = (const GLushort (*)[4]) src;
}
}
if (useTemp)
- _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));
+ memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));
}
break;
case GL_FLOAT:
}
}
if (useTemp)
- _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
+ memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
}
else {
const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src;
}
}
if (useTemp)
- _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));
+ memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));
}
break;
default:
}
if (*height <= 0)
- return GL_TRUE;
+ return GL_FALSE;
return GL_TRUE;
}
*height -= (*srcY + *height - buffer->Height);
if (*height <= 0)
- return GL_TRUE;
+ return GL_FALSE;
return GL_TRUE;
}
return GL_TRUE;
}
+
+
+/**
+ * Clip dst coords against Xmax (or Ymax).
+ */
+static INLINE void
+clip_right_or_top(GLint *srcX0, GLint *srcX1,
+ GLint *dstX0, GLint *dstX1,
+ GLint maxValue)
+{
+ GLfloat t, bias;
+
+ if (*dstX1 > maxValue) {
+ /* X1 outside right edge */
+ ASSERT(*dstX0 < maxValue); /* X0 should be inside right edge */
+ t = (GLfloat) (maxValue - *dstX0) / (GLfloat) (*dstX1 - *dstX0);
+ /* chop off [t, 1] part */
+ ASSERT(t >= 0.0 && t <= 1.0);
+ *dstX1 = maxValue;
+ bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F;
+ *srcX1 = *srcX0 + (GLint) (t * (*srcX1 - *srcX0) + bias);
+ }
+ else if (*dstX0 > maxValue) {
+ /* X0 outside right edge */
+ ASSERT(*dstX1 < maxValue); /* X1 should be inside right edge */
+ t = (GLfloat) (maxValue - *dstX1) / (GLfloat) (*dstX0 - *dstX1);
+ /* chop off [t, 1] part */
+ ASSERT(t >= 0.0 && t <= 1.0);
+ *dstX0 = maxValue;
+ bias = (*srcX0 < *srcX1) ? -0.5F : 0.5F;
+ *srcX0 = *srcX1 + (GLint) (t * (*srcX0 - *srcX1) + bias);
+ }
+}
+
+
+/**
+ * Clip dst coords against Xmin (or Ymin).
+ */
+static INLINE void
+clip_left_or_bottom(GLint *srcX0, GLint *srcX1,
+ GLint *dstX0, GLint *dstX1,
+ GLint minValue)
+{
+ GLfloat t, bias;
+
+ if (*dstX0 < minValue) {
+ /* X0 outside left edge */
+ ASSERT(*dstX1 > minValue); /* X1 should be inside left edge */
+ t = (GLfloat) (minValue - *dstX0) / (GLfloat) (*dstX1 - *dstX0);
+ /* chop off [0, t] part */
+ ASSERT(t >= 0.0 && t <= 1.0);
+ *dstX0 = minValue;
+ bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F; /* flipped??? */
+ *srcX0 = *srcX0 + (GLint) (t * (*srcX1 - *srcX0) + bias);
+ }
+ else if (*dstX1 < minValue) {
+ /* X1 outside left edge */
+ ASSERT(*dstX0 > minValue); /* X0 should be inside left edge */
+ t = (GLfloat) (minValue - *dstX1) / (GLfloat) (*dstX0 - *dstX1);
+ /* chop off [0, t] part */
+ ASSERT(t >= 0.0 && t <= 1.0);
+ *dstX1 = minValue;
+ bias = (*srcX0 < *srcX1) ? 0.5F : -0.5F;
+ *srcX1 = *srcX1 + (GLint) (t * (*srcX0 - *srcX1) + bias);
+ }
+}
+
+
+/**
+ * Do clipping of blit src/dest rectangles.
+ * The dest rect is clipped against both the buffer bounds and scissor bounds.
+ * The src rect is just clipped against the buffer bounds.
+ *
+ * When either the src or dest rect is clipped, the other is also clipped
+ * proportionately!
+ *
+ * Note that X0 need not be less than X1 (same for Y) for either the source
+ * and dest rects. That makes the clipping a little trickier.
+ *
+ * \return GL_TRUE if anything is left to draw, GL_FALSE if totally clipped
+ */
+GLboolean
+_mesa_clip_blit(GLcontext *ctx,
+ GLint *srcX0, GLint *srcY0, GLint *srcX1, GLint *srcY1,
+ GLint *dstX0, GLint *dstY0, GLint *dstX1, GLint *dstY1)
+{
+ const GLint srcXmin = 0;
+ const GLint srcXmax = ctx->ReadBuffer->Width;
+ const GLint srcYmin = 0;
+ const GLint srcYmax = ctx->ReadBuffer->Height;
+
+ /* these include scissor bounds */
+ const GLint dstXmin = ctx->DrawBuffer->_Xmin;
+ const GLint dstXmax = ctx->DrawBuffer->_Xmax;
+ const GLint dstYmin = ctx->DrawBuffer->_Ymin;
+ const GLint dstYmax = ctx->DrawBuffer->_Ymax;
+
+ /*
+ printf("PreClipX: src: %d .. %d dst: %d .. %d\n",
+ *srcX0, *srcX1, *dstX0, *dstX1);
+ printf("PreClipY: src: %d .. %d dst: %d .. %d\n",
+ *srcY0, *srcY1, *dstY0, *dstY1);
+ */
+
+ /* trivial rejection tests */
+ if (*dstX0 == *dstX1)
+ return GL_FALSE; /* no width */
+ if (*dstX0 <= dstXmin && *dstX1 <= dstXmin)
+ return GL_FALSE; /* totally out (left) of bounds */
+ if (*dstX0 >= dstXmax && *dstX1 >= dstXmax)
+ return GL_FALSE; /* totally out (right) of bounds */
+
+ if (*dstY0 == *dstY1)
+ return GL_FALSE;
+ if (*dstY0 <= dstYmin && *dstY1 <= dstYmin)
+ return GL_FALSE;
+ if (*dstY0 >= dstYmax && *dstY1 >= dstYmax)
+ return GL_FALSE;
+
+ if (*srcX0 == *srcX1)
+ return GL_FALSE;
+ if (*srcX0 <= srcXmin && *srcX1 <= srcXmin)
+ return GL_FALSE;
+ if (*srcX0 >= srcXmax && *srcX1 >= srcXmax)
+ return GL_FALSE;
+
+ if (*srcY0 == *srcY1)
+ return GL_FALSE;
+ if (*srcY0 <= srcYmin && *srcY1 <= srcYmin)
+ return GL_FALSE;
+ if (*srcY0 >= srcYmax && *srcY1 >= srcYmax)
+ return GL_FALSE;
+
+ /*
+ * dest clip
+ */
+ clip_right_or_top(srcX0, srcX1, dstX0, dstX1, dstXmax);
+ clip_right_or_top(srcY0, srcY1, dstY0, dstY1, dstYmax);
+ clip_left_or_bottom(srcX0, srcX1, dstX0, dstX1, dstXmin);
+ clip_left_or_bottom(srcY0, srcY1, dstY0, dstY1, dstYmin);
+
+ /*
+ * src clip (just swap src/dst values from above)
+ */
+ clip_right_or_top(dstX0, dstX1, srcX0, srcX1, srcXmax);
+ clip_right_or_top(dstY0, dstY1, srcY0, srcY1, srcYmax);
+ clip_left_or_bottom(dstX0, dstX1, srcX0, srcX1, srcXmin);
+ clip_left_or_bottom(dstY0, dstY1, srcY0, srcY1, srcYmin);
+
+ /*
+ printf("PostClipX: src: %d .. %d dst: %d .. %d\n",
+ *srcX0, *srcX1, *dstX0, *dstX1);
+ printf("PostClipY: src: %d .. %d dst: %d .. %d\n",
+ *srcY0, *srcY1, *dstY0, *dstY1);
+ */
+
+ ASSERT(*dstX0 >= dstXmin);
+ ASSERT(*dstX0 <= dstXmax);
+ ASSERT(*dstX1 >= dstXmin);
+ ASSERT(*dstX1 <= dstXmax);
+
+ ASSERT(*dstY0 >= dstYmin);
+ ASSERT(*dstY0 <= dstYmax);
+ ASSERT(*dstY1 >= dstYmin);
+ ASSERT(*dstY1 <= dstYmax);
+
+ ASSERT(*srcX0 >= srcXmin);
+ ASSERT(*srcX0 <= srcXmax);
+ ASSERT(*srcX1 >= srcXmin);
+ ASSERT(*srcX1 <= srcXmax);
+
+ ASSERT(*srcY0 >= srcYmin);
+ ASSERT(*srcY0 <= srcYmax);
+ ASSERT(*srcY1 >= srcYmin);
+ ASSERT(*srcY1 <= srcYmax);
+
+ return GL_TRUE;
+}
projects / mesa.git / blobdiff