- for (i = 0; i < width * height; i++) {
- for (ch = 0; ch < 4; ch++) {
- if (colormask[ch]) {
- GLfloat val = abuf[i * 4 + ch] * value;
- abuf[i * 4 + ch] = CLAMP(val, 0.0, 1.0);
- }
- else {
- abuf[i * 4 + ch] = cbuf[i * 4 + ch];
+ if (!colormask[0] || !colormask[1] || !colormask[2] || !colormask[3])
+ usage = PIPE_TRANSFER_READ_WRITE;
+ else
+ usage = PIPE_TRANSFER_WRITE;
+
+ color_trans = st_cond_flush_get_tex_transfer(st_context(ctx),
+ color_strb->texture, 0, 0, 0,
+ usage,
+ xpos, ypos,
+ width, height);
+
+ if (usage & PIPE_TRANSFER_READ)
+ pipe_get_tile_rgba(pipe, color_trans, 0, 0, width, height, buf);
+
+ switch (acc_strb->format) {
+ case PIPE_FORMAT_R16G16B16A16_SNORM:
+ {
+ GLfloat *color = buf;
+ int i, j, ch;
+ for (i = 0; i < height; i++) {
+ const GLshort *acc = (const GLshort *) (data + (ypos + i) * stride + xpos * 8);
+ for (j = 0; j < width; j++) {
+ for (ch = 0; ch < 4; ch++) {
+ if (colormask[ch]) {
+ GLfloat val = SHORT_TO_FLOAT(*acc * value);
+ *color = CLAMP(val, 0.0f, 1.0f);
+ }
+ else {
+ /* No change */
+ }
+ ++acc;
+ ++color;
+ }
+ }