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New st_clear_accum_buffer() function (can't use pipe->clear() since it doesn't handle negative color values)

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Also, remove unneeded clamping in the accum ops.
This commit is contained in:
Brian 2007-10-16 18:45:28 -06:00
parent 4959617164
commit 2de9477fee
2 changed files with 41 additions and 6 deletions
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44
src/mesa/state_tracker/st_cb_accum.c
View file

@ -51,6 +51,41 @@
*/
void
st_clear_accum_buffer(GLcontext *ctx, struct gl_renderbuffer *rb)
{
struct pipe_context *pipe = ctx->st->pipe;
struct st_renderbuffer *acc_strb = st_renderbuffer(rb);
struct pipe_surface *acc_ps = acc_strb->surface;
const GLint xpos = ctx->DrawBuffer->_Xmin;
const GLint ypos = ctx->DrawBuffer->_Ymin;
const GLint width = ctx->DrawBuffer->_Xmax - xpos;
const GLint height = ctx->DrawBuffer->_Ymax - ypos;
const GLfloat r = ctx->Accum.ClearColor[0];
const GLfloat g = ctx->Accum.ClearColor[1];
const GLfloat b = ctx->Accum.ClearColor[2];
const GLfloat a = ctx->Accum.ClearColor[3];
GLfloat *accBuf;
GLint i;
(void) pipe->region_map(pipe, acc_ps->region);
accBuf = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat));
for (i = 0; i < width * height; i++) {
accBuf[i * 4 + 0] = r;
accBuf[i * 4 + 1] = g;
accBuf[i * 4 + 2] = b;
accBuf[i * 4 + 3] = a;
}
acc_ps->put_tile(acc_ps, xpos, ypos, width, height, accBuf);
pipe->region_unmap(pipe, acc_ps->region);
}
/** For ADD/MULT */
static void
accum_mad(struct pipe_context *pipe, GLfloat scale, GLfloat bias,
@ -67,8 +102,7 @@ accum_mad(struct pipe_context *pipe, GLfloat scale, GLfloat bias,
acc_ps->get_tile(acc_ps, xpos, ypos, width, height, accBuf);
for (i = 0; i < 4 * width * height; i++) {
GLfloat val = accBuf[i] * scale + bias;
accBuf[i] = CLAMP(val, 0.0, 1.0);
accBuf[i] = accBuf[i] * scale + bias;
}
acc_ps->put_tile(acc_ps, xpos, ypos, width, height, accBuf);
@ -99,8 +133,7 @@ accum_accum(struct pipe_context *pipe, GLfloat value,
acc_ps->get_tile(acc_ps, xpos, ypos, width, height, accBuf);
for (i = 0; i < 4 * width * height; i++) {
GLfloat val = accBuf[i] + colorBuf[i] * value;
accBuf[i] = CLAMP(val, 0.0, 1.0);
accBuf[i] = accBuf[i] + colorBuf[i] * value;
}
acc_ps->put_tile(acc_ps, xpos, ypos, width, height, accBuf);
@ -130,8 +163,7 @@ accum_load(struct pipe_context *pipe, GLfloat value,
color_ps->get_tile(color_ps, xpos, ypos, width, height, buf);
for (i = 0; i < 4 * width * height; i++) {
GLfloat val = buf[i] * value;
buf[i] = CLAMP(val, 0.0, 1.0);
buf[i] = buf[i] * value;
}
acc_ps->put_tile(acc_ps, xpos, ypos, width, height, buf);

3
src/mesa/state_tracker/st_cb_accum.h
View file

@ -30,6 +30,9 @@
#define ST_CB_ACCUM_H
extern void
st_clear_accum_buffer(GLcontext *ctx, struct gl_renderbuffer *rb);
extern void st_init_accum_functions(struct dd_function_table *functions);