--- /dev/null
+/*
+ * Copyright (C) 2010 Maciej Cencora <m.cencora@gmail.com>
+ *
+ * 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, sublicense, 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 NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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.
+ *
+ */
+
+#include "stdint.h"
+#include "main/bufferobj.h"
+#include "main/enums.h"
+#include "main/image.h"
+#include "main/state.h"
+#include "swrast/swrast.h"
+
+#include "radeon_common_context.h"
+#include "radeon_debug.h"
+#include "radeon_mipmap_tree.h"
+
+static gl_format gl_format_and_type_to_mesa_format(GLenum format, GLenum type)
+{
+ switch (format)
+ {
+ case GL_RGB:
+ switch (type) {
+ case GL_UNSIGNED_SHORT_5_6_5:
+ return MESA_FORMAT_RGB565;
+ case GL_UNSIGNED_SHORT_5_6_5_REV:
+ return MESA_FORMAT_RGB565_REV;
+ }
+ break;
+ case GL_RGBA:
+ switch (type) {
+ case GL_UNSIGNED_BYTE:
+ return MESA_FORMAT_RGBA8888_REV;
+ case GL_FLOAT:
+ return MESA_FORMAT_RGBA_FLOAT32;
+ case GL_UNSIGNED_SHORT_4_4_4_4:
+ return MESA_FORMAT_ARGB4444;
+ case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+ return MESA_FORMAT_ARGB4444;
+ case GL_UNSIGNED_SHORT_5_5_5_1:
+ return MESA_FORMAT_RGBA5551;
+ case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+ return MESA_FORMAT_ARGB1555_REV;
+ case GL_UNSIGNED_INT_8_8_8_8:
+ return MESA_FORMAT_ARGB8888;
+ case GL_UNSIGNED_INT_8_8_8_8_REV:
+ return MESA_FORMAT_ARGB8888_REV;
+ }
+ break;
+ }
+
+ return MESA_FORMAT_NONE;
+}
+
+static GLboolean
+do_blit_readpixels(GLcontext * ctx,
+ GLint x, GLint y, GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *pack, GLvoid * pixels)
+{
+ radeonContextPtr radeon = RADEON_CONTEXT(ctx);
+ const struct radeon_renderbuffer *rrb = radeon_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
+ const gl_format dst_format = gl_format_and_type_to_mesa_format(format, type);
+ unsigned dst_rowstride, dst_imagesize, aligned_rowstride, flip_y;
+ struct radeon_bo *dst_buffer;
+ GLint dst_x = 0, dst_y = 0;
+
+ /* It's not worth if number of pixels to copy is really small */
+ if (width * height < 100) {
+ return GL_FALSE;
+ }
+
+ if (dst_format == MESA_FORMAT_NONE ||
+ !radeon->vtbl.check_blit(dst_format) || !radeon->vtbl.blit) {
+ return GL_FALSE;
+ }
+
+ if (ctx->_ImageTransferState) {
+ return GL_FALSE;
+ }
+
+ if (pack->SwapBytes || pack->LsbFirst) {
+ return GL_FALSE;
+ }
+
+ if (pack->RowLength > 0) {
+ dst_rowstride = pack->RowLength;
+ } else {
+ dst_rowstride = width;
+ }
+
+ if (!_mesa_clip_copytexsubimage(ctx, &dst_x, &dst_y, &x, &y, &width, &height)) {
+ return GL_TRUE;
+ }
+ assert(x >= 0 && y >= 0);
+
+ aligned_rowstride = get_texture_image_row_stride(radeon, dst_format, dst_rowstride, 0);
+ dst_imagesize = get_texture_image_size(dst_format,
+ aligned_rowstride,
+ height, 1, 0);
+ dst_buffer = radeon_bo_open(radeon->radeonScreen->bom, 0, dst_imagesize, 1024, RADEON_GEM_DOMAIN_GTT, 0);
+
+ /* Disable source Y flipping for FBOs */
+ flip_y = (ctx->ReadBuffer->Name == 0);
+ if (pack->Invert) {
+ y = rrb->base.Height - height - y;
+ flip_y = !flip_y;
+ }
+
+ if (radeon->vtbl.blit(ctx,
+ rrb->bo,
+ rrb->draw_offset,
+ rrb->base.Format,
+ rrb->pitch / rrb->cpp,
+ rrb->base.Width,
+ rrb->base.Height,
+ x,
+ y,
+ dst_buffer,
+ 0, /* dst_offset */
+ dst_format,
+ aligned_rowstride / _mesa_get_format_bytes(dst_format),
+ width,
+ height,
+ 0, /* dst_x */
+ 0, /* dst_y */
+ width,
+ height,
+ flip_y))
+ {
+ radeon_bo_map(dst_buffer, 0);
+ dst_rowstride *= _mesa_get_format_bytes(dst_format);
+ copy_rows(pixels, dst_rowstride, dst_buffer->ptr,
+ aligned_rowstride, height, dst_rowstride);
+ radeon_bo_unmap(dst_buffer);
+ radeon_bo_unref(dst_buffer);
+ return GL_TRUE;
+ } else {
+ radeon_bo_unref(dst_buffer);
+ return GL_FALSE;
+ }
+}
+
+void
+radeonReadPixels(GLcontext * ctx,
+ GLint x, GLint y, GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *pack, GLvoid * pixels)
+{
+ if (do_blit_readpixels(ctx, x, y, width, height, format, type, pack, pixels))
+ return;
+
+ /* Update Mesa state before calling down into _swrast_ReadPixels, as
+ * the spans code requires the computed buffer states to be up to date,
+ * but _swrast_ReadPixels only updates Mesa state after setting up
+ * the spans code.
+ */
+
+ radeon_print(RADEON_FALLBACKS, RADEON_NORMAL,
+ "Falling back to sw for ReadPixels (format %s, type %s)\n",
+ _mesa_lookup_enum_by_nr(format), _mesa_lookup_enum_by_nr(type));
+
+ if (ctx->NewState)
+ _mesa_update_state(ctx);
+
+ _swrast_ReadPixels(ctx, x, y, width, height, format, type, pack, pixels);
+}
projects / mesa.git / commitdiff