summaryrefslogtreecommitdiff
path: root/src/mesa/state_tracker/st_cb_accum.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/mesa/state_tracker/st_cb_accum.c')
-rw-r--r--src/mesa/state_tracker/st_cb_accum.c333
1 files changed, 333 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_cb_accum.c b/src/mesa/state_tracker/st_cb_accum.c
new file mode 100644
index 0000000000..95181578f6
--- /dev/null
+++ b/src/mesa/state_tracker/st_cb_accum.c
@@ -0,0 +1,333 @@
+/**************************************************************************
+ *
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+ /*
+ * Authors:
+ * Brian Paul
+ */
+
+#include "main/imports.h"
+#include "main/image.h"
+#include "main/macros.h"
+
+#include "st_context.h"
+#include "st_cb_accum.h"
+#include "st_cb_fbo.h"
+#include "st_draw.h"
+#include "st_public.h"
+#include "st_format.h"
+#include "st_texture.h"
+#include "st_inlines.h"
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_inlines.h"
+#include "util/u_tile.h"
+
+
+/**
+ * For hardware that supports deep color buffers, we could accelerate
+ * most/all the accum operations with blending/texturing.
+ * For now, just use the get/put_tile() functions and do things in software.
+ */
+
+
+void
+st_clear_accum_buffer(GLcontext *ctx, struct gl_renderbuffer *rb)
+{
+ struct st_renderbuffer *acc_strb = st_renderbuffer(rb);
+ 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;
+ size_t stride = acc_strb->stride;
+ GLubyte *data = acc_strb->data;
+
+ if(!data)
+ return;
+
+ switch (acc_strb->format) {
+ case PIPE_FORMAT_R16G16B16A16_SNORM:
+ {
+ GLshort r = FLOAT_TO_SHORT(ctx->Accum.ClearColor[0]);
+ GLshort g = FLOAT_TO_SHORT(ctx->Accum.ClearColor[1]);
+ GLshort b = FLOAT_TO_SHORT(ctx->Accum.ClearColor[2]);
+ GLshort a = FLOAT_TO_SHORT(ctx->Accum.ClearColor[3]);
+ int i, j;
+ for (i = 0; i < height; i++) {
+ GLshort *dst = (GLshort *) (data + (ypos + i) * stride + xpos * 8);
+ for (j = 0; j < width; j++) {
+ dst[0] = r;
+ dst[1] = g;
+ dst[2] = b;
+ dst[3] = a;
+ dst += 4;
+ }
+ }
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "unexpected format in st_clear_accum_buffer()");
+ }
+}
+
+
+/** For ADD/MULT */
+static void
+accum_mad(GLcontext *ctx, GLfloat scale, GLfloat bias,
+ GLint xpos, GLint ypos, GLint width, GLint height,
+ struct st_renderbuffer *acc_strb)
+{
+ size_t stride = acc_strb->stride;
+ GLubyte *data = acc_strb->data;
+
+ switch (acc_strb->format) {
+ case PIPE_FORMAT_R16G16B16A16_SNORM:
+ {
+ int i, j;
+ for (i = 0; i < height; i++) {
+ GLshort *acc = (GLshort *) (data + (ypos + i) * stride + xpos * 8);
+ for (j = 0; j < width * 4; j++) {
+ float val = SHORT_TO_FLOAT(*acc) * scale + bias;
+ *acc++ = FLOAT_TO_SHORT(val);
+ }
+ }
+ }
+ break;
+ default:
+ _mesa_problem(NULL, "unexpected format in st_clear_accum_buffer()");
+ }
+}
+
+
+static void
+accum_accum(struct st_context *st, GLfloat value,
+ GLint xpos, GLint ypos, GLint width, GLint height,
+ struct st_renderbuffer *acc_strb,
+ struct st_renderbuffer *color_strb)
+{
+ struct pipe_context *pipe = st->pipe;
+ struct pipe_screen *screen = pipe->screen;
+ struct pipe_transfer *color_trans;
+ size_t stride = acc_strb->stride;
+ GLubyte *data = acc_strb->data;
+ GLfloat *buf;
+
+ color_trans = st_cond_flush_get_tex_transfer(st, color_strb->texture,
+ 0, 0, 0,
+ PIPE_TRANSFER_READ, xpos, ypos,
+ width, height);
+
+ buf = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
+
+ pipe_get_tile_rgba(color_trans, 0, 0, width, height, buf);
+
+ switch (acc_strb->format) {
+ case PIPE_FORMAT_R16G16B16A16_SNORM:
+ {
+ const GLfloat *color = buf;
+ int i, j;
+ for (i = 0; i < height; i++) {
+ GLshort *acc = (GLshort *) (data + (ypos + i) * stride + xpos * 8);
+ for (j = 0; j < width * 4; j++) {
+ float val = *color++ * value;
+ *acc++ += FLOAT_TO_SHORT(val);
+ }
+ }
+ }
+ break;
+ default:
+ _mesa_problem(NULL, "unexpected format in st_clear_accum_buffer()");
+ }
+
+ _mesa_free(buf);
+ screen->tex_transfer_destroy(color_trans);
+}
+
+
+static void
+accum_load(struct st_context *st, GLfloat value,
+ GLint xpos, GLint ypos, GLint width, GLint height,
+ struct st_renderbuffer *acc_strb,
+ struct st_renderbuffer *color_strb)
+{
+ struct pipe_context *pipe = st->pipe;
+ struct pipe_screen *screen = pipe->screen;
+ struct pipe_transfer *color_trans;
+ size_t stride = acc_strb->stride;
+ GLubyte *data = acc_strb->data;
+ GLfloat *buf;
+
+ color_trans = st_cond_flush_get_tex_transfer(st, color_strb->texture,
+ 0, 0, 0,
+ PIPE_TRANSFER_READ, xpos, ypos,
+ width, height);
+
+ buf = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
+
+ pipe_get_tile_rgba(color_trans, 0, 0, width, height, buf);
+
+ switch (acc_strb->format) {
+ case PIPE_FORMAT_R16G16B16A16_SNORM:
+ {
+ const GLfloat *color = buf;
+ int i, j;
+ for (i = 0; i < height; i++) {
+ GLshort *acc = (GLshort *) (data + (ypos + i) * stride + xpos * 8);
+ for (j = 0; j < width * 4; j++) {
+ float val = *color++ * value;
+ *acc++ = FLOAT_TO_SHORT(val);
+ }
+ }
+ }
+ break;
+ default:
+ _mesa_problem(NULL, "unexpected format in st_clear_accum_buffer()");
+ }
+
+ _mesa_free(buf);
+ screen->tex_transfer_destroy(color_trans);
+}
+
+
+static void
+accum_return(GLcontext *ctx, GLfloat value,
+ GLint xpos, GLint ypos, GLint width, GLint height,
+ struct st_renderbuffer *acc_strb,
+ struct st_renderbuffer *color_strb)
+{
+ struct pipe_context *pipe = ctx->st->pipe;
+ struct pipe_screen *screen = pipe->screen;
+ const GLubyte *colormask = ctx->Color.ColorMask;
+ enum pipe_transfer_usage usage;
+ struct pipe_transfer *color_trans;
+ size_t stride = acc_strb->stride;
+ const GLubyte *data = acc_strb->data;
+ GLfloat *buf;
+
+ buf = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
+
+ 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_WRITE)
+ pipe_get_tile_rgba(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;
+ }
+ }
+ }
+ }
+ break;
+ default:
+ _mesa_problem(NULL, "unexpected format in st_clear_accum_buffer()");
+ }
+
+ pipe_put_tile_rgba(color_trans, 0, 0, width, height, buf);
+
+ _mesa_free(buf);
+ screen->tex_transfer_destroy(color_trans);
+}
+
+
+static void
+st_Accum(GLcontext *ctx, GLenum op, GLfloat value)
+{
+ struct st_context *st = ctx->st;
+ struct st_renderbuffer *acc_strb
+ = st_renderbuffer(ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer);
+ struct st_renderbuffer *color_strb
+ = st_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
+
+ 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;
+
+ if(!acc_strb->data)
+ return;
+
+ /* make sure color bufs aren't cached */
+ st_flush( st, PIPE_FLUSH_RENDER_CACHE, NULL );
+
+ switch (op) {
+ case GL_ADD:
+ if (value != 0.0F) {
+ accum_mad(ctx, 1.0, value, xpos, ypos, width, height, acc_strb);
+ }
+ break;
+ case GL_MULT:
+ if (value != 1.0F) {
+ accum_mad(ctx, value, 0.0, xpos, ypos, width, height, acc_strb);
+ }
+ break;
+ case GL_ACCUM:
+ if (value != 0.0F) {
+ accum_accum(st, value, xpos, ypos, width, height, acc_strb, color_strb);
+ }
+ break;
+ case GL_LOAD:
+ accum_load(st, value, xpos, ypos, width, height, acc_strb, color_strb);
+ break;
+ case GL_RETURN:
+ accum_return(ctx, value, xpos, ypos, width, height, acc_strb, color_strb);
+ break;
+ default:
+ assert(0);
+ }
+}
+
+
+
+void st_init_accum_functions(struct dd_function_table *functions)
+{
+ functions->Accum = st_Accum;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-29 11:29:53 +0000