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Diffstat (limited to 'src/mesa/swrast/s_copypix.c')
-rw-r--r--src/mesa/swrast/s_copypix.c116
1 files changed, 33 insertions, 83 deletions
diff --git a/src/mesa/swrast/s_copypix.c b/src/mesa/swrast/s_copypix.c
index 2c6bd263123..7f5f41b78f6 100644
--- a/src/mesa/swrast/s_copypix.c
+++ b/src/mesa/swrast/s_copypix.c
@@ -1,4 +1,4 @@
-/* $Id: s_copypix.c,v 1.38 2002/06/15 03:03:11 brianp Exp $ */
+/* $Id: s_copypix.c,v 1.39 2002/07/09 01:22:52 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -103,7 +103,6 @@ copy_conv_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
GLboolean quick_draw;
GLint row;
GLboolean changeBuffer;
- GLchan *saveReadAlpha;
const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
const GLuint transferOps = ctx->_ImageTransferState;
GLfloat *dest, *tmpImage, *convImage;
@@ -128,7 +127,6 @@ copy_conv_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
}
/* If read and draw buffer are different we must do buffer switching */
- saveReadAlpha = ctx->ReadBuffer->Alpha;
changeBuffer = ctx->Pixel.ReadBuffer != ctx->Color.DrawBuffer
|| ctx->DrawBuffer != ctx->ReadBuffer;
@@ -149,16 +147,8 @@ copy_conv_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
dest = tmpImage;
if (changeBuffer) {
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer );
- if (ctx->Pixel.DriverReadBuffer == GL_FRONT_LEFT)
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->FrontLeftAlpha;
- else if (ctx->Pixel.DriverReadBuffer == GL_BACK_LEFT)
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->BackLeftAlpha;
- else if (ctx->Pixel.DriverReadBuffer == GL_FRONT_RIGHT)
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->FrontRightAlpha;
- else
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->BackRightAlpha;
+ /* choose the read buffer */
+ _swrast_use_read_buffer(ctx);
}
/* read source image */
@@ -176,11 +166,9 @@ copy_conv_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
}
}
- /* read from the draw buffer again (in case of blending) */
if (changeBuffer) {
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
- ctx->Color.DriverDrawBuffer );
- ctx->ReadBuffer->Alpha = saveReadAlpha;
+ /* restore default src/dst buffer */
+ _swrast_use_draw_buffer(ctx);
}
/* do image transfer ops up until convolution */
@@ -301,7 +289,6 @@ copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
GLboolean quick_draw;
GLint sy, dy, stepy, j;
GLboolean changeBuffer;
- GLchan *saveReadAlpha;
const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
GLint overlapping;
const GLuint transferOps = ctx->_ImageTransferState;
@@ -347,13 +334,9 @@ copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
}
/* If read and draw buffer are different we must do buffer switching */
- saveReadAlpha = ctx->ReadBuffer->Alpha;
changeBuffer = ctx->Pixel.ReadBuffer != ctx->Color.DrawBuffer
|| ctx->DrawBuffer != ctx->ReadBuffer;
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer );
-
if (overlapping) {
GLint ssy = sy;
tmpImage = (GLchan *) MALLOC(width * height * sizeof(GLchan) * 4);
@@ -361,25 +344,22 @@ copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
_mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
return;
}
+ /* setup source */
+ if (changeBuffer)
+ _swrast_use_read_buffer(ctx);
+ /* read the source image */
p = tmpImage;
- if (changeBuffer) {
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer );
- if (ctx->Pixel.DriverReadBuffer == GL_FRONT_LEFT)
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->FrontLeftAlpha;
- else if (ctx->Pixel.DriverReadBuffer == GL_BACK_LEFT)
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->BackLeftAlpha;
- else if (ctx->Pixel.DriverReadBuffer == GL_FRONT_RIGHT)
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->FrontRightAlpha;
- else
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->BackRightAlpha;
- }
for (j = 0; j < height; j++, ssy += stepy) {
_mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, srcx, ssy,
(GLchan (*)[4]) p );
p += width * 4;
}
p = tmpImage;
+ /* restore dest */
+ if (changeBuffer) {
+ _swrast_use_draw_buffer(ctx);
+ changeBuffer = GL_FALSE;
+ }
}
else {
tmpImage = NULL; /* silence compiler warnings */
@@ -395,30 +375,12 @@ copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
}
else {
/* get from framebuffer */
- if (changeBuffer) {
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer );
- if (ctx->Pixel.DriverReadBuffer == GL_FRONT_LEFT) {
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->FrontLeftAlpha;
- }
- else if (ctx->Pixel.DriverReadBuffer == GL_BACK_LEFT) {
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->BackLeftAlpha;
- }
- else if (ctx->Pixel.DriverReadBuffer == GL_FRONT_RIGHT) {
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->FrontRightAlpha;
- }
- else {
- ctx->ReadBuffer->Alpha = ctx->ReadBuffer->BackRightAlpha;
- }
- }
- _mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, srcx, sy, span->color.rgba );
- }
-
- if (changeBuffer) {
- /* read from the draw buffer again (in case of blending) */
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
- ctx->Color.DriverDrawBuffer );
- ctx->ReadBuffer->Alpha = saveReadAlpha;
+ if (changeBuffer)
+ _swrast_use_read_buffer(ctx);
+ _mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, srcx, sy,
+ span->color.rgba );
+ if (changeBuffer)
+ _swrast_use_draw_buffer(ctx);
}
if (transferOps) {
@@ -525,10 +487,6 @@ copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
}
}
- /* Restore pixel source to be the draw buffer (for blending, etc) */
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
- ctx->Color.DriverDrawBuffer );
-
if (overlapping)
FREE(tmpImage);
}
@@ -576,9 +534,6 @@ static void copy_ci_pixels( GLcontext *ctx,
changeBuffer = ctx->Pixel.ReadBuffer != ctx->Color.DrawBuffer
|| ctx->DrawBuffer != ctx->ReadBuffer;
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer );
-
if (overlapping) {
GLint ssy = sy;
tmpImage = (GLuint *) MALLOC(width * height * sizeof(GLuint));
@@ -586,16 +541,21 @@ static void copy_ci_pixels( GLcontext *ctx,
_mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
return;
}
+ /* setup source */
+ if (changeBuffer)
+ _swrast_use_read_buffer(ctx);
+ /* read the image */
p = tmpImage;
- if (changeBuffer) {
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer );
- }
for (j = 0; j < height; j++, ssy += stepy) {
_mesa_read_index_span( ctx, ctx->ReadBuffer, width, srcx, ssy, p );
p += width;
}
p = tmpImage;
+ /* restore to draw buffer */
+ if (changeBuffer) {
+ _swrast_use_draw_buffer(ctx);
+ changeBuffer = GL_FALSE;
+ }
}
else {
tmpImage = NULL; /* silence compiler warning */
@@ -608,18 +568,12 @@ static void copy_ci_pixels( GLcontext *ctx,
p += width;
}
else {
- if (changeBuffer) {
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
- ctx->Pixel.DriverReadBuffer );
- }
+ if (changeBuffer)
+ _swrast_use_read_buffer(ctx);
_mesa_read_index_span( ctx, ctx->ReadBuffer, width, srcx, sy,
span->color.index );
- }
-
- if (changeBuffer) {
- /* set read buffer back to draw buffer (in case of logicops) */
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
- ctx->Color.DriverDrawBuffer );
+ if (changeBuffer)
+ _swrast_use_draw_buffer(ctx);
}
if (shift_or_offset) {
@@ -638,10 +592,6 @@ static void copy_ci_pixels( GLcontext *ctx,
_mesa_write_index_span(ctx, span);
}
- /* Restore pixel source to be the draw buffer (for blending, etc) */
- (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
- ctx->Color.DriverDrawBuffer );
-
if (overlapping)
FREE(tmpImage);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 13:02:44 +0000