/*
* Mesa 3-D graphics library
- * Version: 7.1
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
*
* 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
- * BRIAN PAUL 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.
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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 "glheader.h"
-#include "imports.h"
+#include "util/imports.h"
+#include "blend.h"
#include "bufferobj.h"
#include "context.h"
#include "enums.h"
#include "pack.h"
#include "pbo.h"
#include "state.h"
+#include "glformats.h"
+#include "fbobject.h"
+#include "format_utils.h"
+#include "pixeltransfer.h"
/**
- * Tries to implement glReadPixels() of GL_DEPTH_COMPONENT using memcpy of the
- * mapping.
+ * Return true if the conversion L=R+G+B is needed.
*/
+GLboolean
+_mesa_need_rgb_to_luminance_conversion(GLenum srcBaseFormat,
+ GLenum dstBaseFormat)
+{
+ return (srcBaseFormat == GL_RG ||
+ srcBaseFormat == GL_RGB ||
+ srcBaseFormat == GL_RGBA) &&
+ (dstBaseFormat == GL_LUMINANCE ||
+ dstBaseFormat == GL_LUMINANCE_ALPHA);
+}
+
+/**
+ * Return true if the conversion L,I to RGB conversion is needed.
+ */
+GLboolean
+_mesa_need_luminance_to_rgb_conversion(GLenum srcBaseFormat,
+ GLenum dstBaseFormat)
+{
+ return (srcBaseFormat == GL_LUMINANCE ||
+ srcBaseFormat == GL_LUMINANCE_ALPHA ||
+ srcBaseFormat == GL_INTENSITY) &&
+ (dstBaseFormat == GL_GREEN ||
+ dstBaseFormat == GL_BLUE ||
+ dstBaseFormat == GL_RG ||
+ dstBaseFormat == GL_RGB ||
+ dstBaseFormat == GL_BGR ||
+ dstBaseFormat == GL_RGBA ||
+ dstBaseFormat == GL_BGRA);
+}
+
+/**
+ * Return transfer op flags for this ReadPixels operation.
+ */
+GLbitfield
+_mesa_get_readpixels_transfer_ops(const struct gl_context *ctx,
+ mesa_format texFormat,
+ GLenum format, GLenum type,
+ GLboolean uses_blit)
+{
+ GLbitfield transferOps = ctx->_ImageTransferState;
+ GLenum srcBaseFormat = _mesa_get_format_base_format(texFormat);
+ GLenum dstBaseFormat = _mesa_unpack_format_to_base_format(format);
+
+ if (format == GL_DEPTH_COMPONENT ||
+ format == GL_DEPTH_STENCIL ||
+ format == GL_STENCIL_INDEX) {
+ return 0;
+ }
+
+ /* Pixel transfer ops (scale, bias, table lookup) do not apply
+ * to integer formats.
+ */
+ if (_mesa_is_enum_format_integer(format)) {
+ return 0;
+ }
+
+ if (uses_blit) {
+ /* For blit-based ReadPixels packing, the clamping is done automatically
+ * unless the type is float. */
+ if (_mesa_get_clamp_read_color(ctx, ctx->ReadBuffer) &&
+ (type == GL_FLOAT || type == GL_HALF_FLOAT ||
+ type == GL_UNSIGNED_INT_10F_11F_11F_REV)) {
+ transferOps |= IMAGE_CLAMP_BIT;
+ }
+ }
+ else {
+ /* For CPU-based ReadPixels packing, the clamping must always be done
+ * for non-float types, */
+ if (_mesa_get_clamp_read_color(ctx, ctx->ReadBuffer) ||
+ (type != GL_FLOAT && type != GL_HALF_FLOAT &&
+ type != GL_UNSIGNED_INT_10F_11F_11F_REV)) {
+ transferOps |= IMAGE_CLAMP_BIT;
+ }
+ }
+
+ /* If the format is unsigned normalized, we can ignore clamping
+ * because the values are already in the range [0,1] so it won't
+ * have any effect anyway.
+ */
+ if (_mesa_get_format_datatype(texFormat) == GL_UNSIGNED_NORMALIZED &&
+ !_mesa_need_rgb_to_luminance_conversion(srcBaseFormat, dstBaseFormat)) {
+ transferOps &= ~IMAGE_CLAMP_BIT;
+ }
+
+ return transferOps;
+}
+
+
+/**
+ * Return true if memcpy cannot be used for ReadPixels.
+ *
+ * If uses_blit is true, the function returns true if a simple 3D engine blit
+ * cannot be used for ReadPixels packing.
+ *
+ * NOTE: This doesn't take swizzling and format conversions between
+ * the readbuffer and the pixel pack buffer into account.
+ */
+GLboolean
+_mesa_readpixels_needs_slow_path(const struct gl_context *ctx, GLenum format,
+ GLenum type, GLboolean uses_blit)
+{
+ struct gl_renderbuffer *rb =
+ _mesa_get_read_renderbuffer_for_format(ctx, format);
+ GLenum dstBaseFormat = _mesa_unpack_format_to_base_format(format);
+
+ assert(rb);
+
+ /* There are different rules depending on the base format. */
+ switch (format) {
+ case GL_DEPTH_STENCIL:
+ return !_mesa_has_depthstencil_combined(ctx->ReadBuffer) ||
+ ctx->Pixel.DepthScale != 1.0f || ctx->Pixel.DepthBias != 0.0f ||
+ ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset ||
+ ctx->Pixel.MapStencilFlag;
+
+ case GL_DEPTH_COMPONENT:
+ return ctx->Pixel.DepthScale != 1.0f || ctx->Pixel.DepthBias != 0.0f;
+
+ case GL_STENCIL_INDEX:
+ return ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset ||
+ ctx->Pixel.MapStencilFlag;
+
+ default:
+ /* Color formats. */
+ if (_mesa_need_rgb_to_luminance_conversion(rb->_BaseFormat,
+ dstBaseFormat)) {
+ return GL_TRUE;
+ }
+
+ /* And finally, see if there are any transfer ops. */
+ return _mesa_get_readpixels_transfer_ops(ctx, rb->Format, format, type,
+ uses_blit) != 0;
+ }
+ return GL_FALSE;
+}
+
+
static GLboolean
-fast_read_depth_pixels( struct gl_context *ctx,
+readpixels_can_use_memcpy(const struct gl_context *ctx, GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *packing)
+{
+ struct gl_renderbuffer *rb =
+ _mesa_get_read_renderbuffer_for_format(ctx, format);
+
+ assert(rb);
+
+ if (_mesa_readpixels_needs_slow_path(ctx, format, type, GL_FALSE)) {
+ return GL_FALSE;
+ }
+
+ /* The base internal format and the base Mesa format must match. */
+ if (rb->_BaseFormat != _mesa_get_format_base_format(rb->Format)) {
+ return GL_FALSE;
+ }
+
+ /* The Mesa format must match the input format and type. */
+ if (!_mesa_format_matches_format_and_type(rb->Format, format, type,
+ packing->SwapBytes, NULL)) {
+ return GL_FALSE;
+ }
+
+ return GL_TRUE;
+}
+
+
+static GLboolean
+readpixels_memcpy(struct gl_context *ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ GLvoid *pixels,
+ const struct gl_pixelstore_attrib *packing)
+{
+ struct gl_renderbuffer *rb =
+ _mesa_get_read_renderbuffer_for_format(ctx, format);
+ GLubyte *dst, *map;
+ int dstStride, stride, j, texelBytes, bytesPerRow;
+
+ /* Fail if memcpy cannot be used. */
+ if (!readpixels_can_use_memcpy(ctx, format, type, packing)) {
+ return GL_FALSE;
+ }
+
+ dstStride = _mesa_image_row_stride(packing, width, format, type);
+ dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
+ format, type, 0, 0);
+
+ ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
+ &map, &stride, ctx->ReadBuffer->FlipY);
+ if (!map) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
+ return GL_TRUE; /* don't bother trying the slow path */
+ }
+
+ texelBytes = _mesa_get_format_bytes(rb->Format);
+ bytesPerRow = texelBytes * width;
+
+ /* memcpy*/
+ if (dstStride == stride && dstStride == bytesPerRow) {
+ memcpy(dst, map, bytesPerRow * height);
+ } else {
+ for (j = 0; j < height; j++) {
+ memcpy(dst, map, bytesPerRow);
+ dst += dstStride;
+ map += stride;
+ }
+ }
+
+ ctx->Driver.UnmapRenderbuffer(ctx, rb);
+ return GL_TRUE;
+}
+
+
+/**
+ * Optimized path for conversion of depth values to GL_DEPTH_COMPONENT,
+ * GL_UNSIGNED_INT.
+ */
+static GLboolean
+read_uint_depth_pixels( struct gl_context *ctx,
GLint x, GLint y,
GLsizei width, GLsizei height,
GLenum type, GLvoid *pixels,
GLubyte *map, *dst;
int stride, dstStride, j;
- if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0)
+ if (ctx->Pixel.DepthScale != 1.0F || ctx->Pixel.DepthBias != 0.0F)
return GL_FALSE;
if (packing->SwapBytes)
if (_mesa_get_format_datatype(rb->Format) != GL_UNSIGNED_NORMALIZED)
return GL_FALSE;
- if (!((type == GL_UNSIGNED_SHORT && rb->Format == MESA_FORMAT_Z16) ||
- type == GL_UNSIGNED_INT))
- return GL_FALSE;
-
ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
- &map, &stride);
+ &map, &stride, fb->FlipY);
if (!map) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
GL_DEPTH_COMPONENT, type, 0, 0);
for (j = 0; j < height; j++) {
- if (type == GL_UNSIGNED_INT) {
- _mesa_unpack_uint_z_row(rb->Format, width, map, (GLuint *)dst);
- } else {
- ASSERT(type == GL_UNSIGNED_SHORT && rb->Format == MESA_FORMAT_Z16);
- memcpy(dst, map, width * 2);
- }
+ _mesa_unpack_uint_z_row(rb->Format, width, map, (GLuint *)dst);
map += stride;
dst += dstStride;
GLint j;
GLubyte *dst, *map;
int dstStride, stride;
+ GLfloat *depthValues;
if (!rb)
return;
/* clipping should have been done already */
- ASSERT(x >= 0);
- ASSERT(y >= 0);
- ASSERT(x + width <= (GLint) rb->Width);
- ASSERT(y + height <= (GLint) rb->Height);
- /* width should never be > MAX_WIDTH since we did clipping earlier */
- ASSERT(width <= MAX_WIDTH);
-
- if (fast_read_depth_pixels(ctx, x, y, width, height, type, pixels, packing))
+ assert(x >= 0);
+ assert(y >= 0);
+ assert(x + width <= (GLint) rb->Width);
+ assert(y + height <= (GLint) rb->Height);
+
+ if (type == GL_UNSIGNED_INT &&
+ read_uint_depth_pixels(ctx, x, y, width, height, type, pixels, packing)) {
return;
+ }
dstStride = _mesa_image_row_stride(packing, width, GL_DEPTH_COMPONENT, type);
dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
GL_DEPTH_COMPONENT, type, 0, 0);
ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
- &map, &stride);
+ &map, &stride, fb->FlipY);
if (!map) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
return;
}
- /* General case (slower) */
- for (j = 0; j < height; j++, y++) {
- GLfloat depthValues[MAX_WIDTH];
- _mesa_unpack_float_z_row(rb->Format, width, map, depthValues);
- _mesa_pack_depth_span(ctx, width, dst, type, depthValues, packing);
+ depthValues = malloc(width * sizeof(GLfloat));
- dst += dstStride;
- map += stride;
+ if (depthValues) {
+ /* General case (slower) */
+ for (j = 0; j < height; j++, y++) {
+ _mesa_unpack_float_z_row(rb->Format, width, map, depthValues);
+ _mesa_pack_depth_span(ctx, width, dst, type, depthValues, packing);
+
+ dst += dstStride;
+ map += stride;
+ }
}
+ else {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
+ }
+
+ free(depthValues);
ctx->Driver.UnmapRenderbuffer(ctx, rb);
}
struct gl_framebuffer *fb = ctx->ReadBuffer;
struct gl_renderbuffer *rb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
GLint j;
- GLubyte *map;
+ GLubyte *map, *stencil;
GLint stride;
if (!rb)
return;
- /* width should never be > MAX_WIDTH since we did clipping earlier */
- ASSERT(width <= MAX_WIDTH);
-
ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
- &map, &stride);
+ &map, &stride, fb->FlipY);
if (!map) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
return;
}
- /* process image row by row */
- for (j = 0; j < height; j++) {
- GLvoid *dest;
- GLubyte stencil[MAX_WIDTH];
-
- _mesa_unpack_ubyte_stencil_row(rb->Format, width, map, stencil);
- dest = _mesa_image_address2d(packing, pixels, width, height,
- GL_STENCIL_INDEX, type, j, 0);
-
- _mesa_pack_stencil_span(ctx, width, type, dest, stencil, packing);
-
- map += stride;
- }
-
- ctx->Driver.UnmapRenderbuffer(ctx, rb);
-}
-
-static GLboolean
-fast_read_rgba_pixels_memcpy( struct gl_context *ctx,
- GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type,
- GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing,
- GLbitfield transferOps )
-{
- struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
- GLubyte *dst, *map;
- int dstStride, stride, j, texelBytes;
+ stencil = malloc(width * sizeof(GLubyte));
- if (!_mesa_format_matches_format_and_type(rb->Format, format, type))
- return GL_FALSE;
+ if (stencil) {
+ /* process image row by row */
+ for (j = 0; j < height; j++) {
+ GLvoid *dest;
- /* check for things we can't handle here */
- if (packing->SwapBytes ||
- packing->LsbFirst) {
- return GL_FALSE;
- }
+ _mesa_unpack_ubyte_stencil_row(rb->Format, width, map, stencil);
+ dest = _mesa_image_address2d(packing, pixels, width, height,
+ GL_STENCIL_INDEX, type, j, 0);
- dstStride = _mesa_image_row_stride(packing, width, format, type);
- dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
- format, type, 0, 0);
+ _mesa_pack_stencil_span(ctx, width, type, dest, stencil, packing);
- ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
- &map, &stride);
- if (!map) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
- return GL_TRUE; /* don't bother trying the slow path */
- }
-
- texelBytes = _mesa_get_format_bytes(rb->Format);
- for (j = 0; j < height; j++) {
- memcpy(dst, map, width * texelBytes);
- dst += dstStride;
- map += stride;
+ map += stride;
+ }
}
-
- ctx->Driver.UnmapRenderbuffer(ctx, rb);
-
- return GL_TRUE;
-}
-
-static void
-slow_read_rgba_pixels( struct gl_context *ctx,
- GLint x, GLint y,
- GLsizei width, GLsizei height,
- GLenum format, GLenum type,
- GLvoid *pixels,
- const struct gl_pixelstore_attrib *packing,
- GLbitfield transferOps )
-{
- struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
- const gl_format rbFormat = _mesa_get_srgb_format_linear(rb->Format);
- union {
- float f[MAX_WIDTH][4];
- unsigned int i[MAX_WIDTH][4];
- } rgba;
- GLubyte *dst, *map;
- int dstStride, stride, j;
-
- dstStride = _mesa_image_row_stride(packing, width, format, type);
- dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
- format, type, 0, 0);
-
- ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
- &map, &stride);
- if (!map) {
+ else {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
- return;
}
- for (j = 0; j < height; j++) {
- if (_mesa_is_integer_format(format)) {
- _mesa_unpack_int_rgba_row(rbFormat, width, map, rgba.i);
- _mesa_pack_rgba_span_int(ctx, width, rgba.i, format, type, dst);
- } else {
- _mesa_unpack_rgba_row(rbFormat, width, map, rgba.f);
- _mesa_pack_rgba_span_float(ctx, width, rgba.f, format, type, dst,
- packing, transferOps);
- }
- dst += dstStride;
- map += stride;
- }
+ free(stencil);
ctx->Driver.UnmapRenderbuffer(ctx, rb);
}
GLenum format, GLenum type, GLvoid *pixels,
const struct gl_pixelstore_attrib *packing )
{
- GLbitfield transferOps = ctx->_ImageTransferState;
+ GLbitfield transferOps;
+ bool dst_is_integer, convert_rgb_to_lum, needs_rebase;
+ int dst_stride, src_stride, rb_stride;
+ uint32_t dst_format, src_format;
+ GLubyte *dst, *map;
+ mesa_format rb_format;
+ bool needs_rgba;
+ void *rgba, *src;
+ bool src_is_uint = false;
+ uint8_t rebase_swizzle[4];
struct gl_framebuffer *fb = ctx->ReadBuffer;
struct gl_renderbuffer *rb = fb->_ColorReadBuffer;
+ GLenum dstBaseFormat = _mesa_unpack_format_to_base_format(format);
if (!rb)
return;
- if ((ctx->Color._ClampReadColor == GL_TRUE || type != GL_FLOAT) &&
- !_mesa_is_integer_format(format)) {
- transferOps |= IMAGE_CLAMP_BIT;
+ transferOps = _mesa_get_readpixels_transfer_ops(ctx, rb->Format, format,
+ type, GL_FALSE);
+ /* Describe the dst format */
+ dst_is_integer = _mesa_is_enum_format_integer(format);
+ dst_stride = _mesa_image_row_stride(packing, width, format, type);
+ dst_format = _mesa_format_from_format_and_type(format, type);
+ convert_rgb_to_lum =
+ _mesa_need_rgb_to_luminance_conversion(rb->_BaseFormat, dstBaseFormat);
+ dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
+ format, type, 0, 0);
+
+ /* Map the source render buffer */
+ ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
+ &map, &rb_stride, fb->FlipY);
+ if (!map) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
+ return;
+ }
+ rb_format = _mesa_get_srgb_format_linear(rb->Format);
+
+ /*
+ * Depending on the base formats involved in the conversion we might need to
+ * rebase some values, so for these formats we compute a rebase swizzle.
+ */
+ if (rb->_BaseFormat == GL_LUMINANCE || rb->_BaseFormat == GL_INTENSITY) {
+ needs_rebase = true;
+ rebase_swizzle[0] = MESA_FORMAT_SWIZZLE_X;
+ rebase_swizzle[1] = MESA_FORMAT_SWIZZLE_ZERO;
+ rebase_swizzle[2] = MESA_FORMAT_SWIZZLE_ZERO;
+ rebase_swizzle[3] = MESA_FORMAT_SWIZZLE_ONE;
+ } else if (rb->_BaseFormat == GL_LUMINANCE_ALPHA) {
+ needs_rebase = true;
+ rebase_swizzle[0] = MESA_FORMAT_SWIZZLE_X;
+ rebase_swizzle[1] = MESA_FORMAT_SWIZZLE_ZERO;
+ rebase_swizzle[2] = MESA_FORMAT_SWIZZLE_ZERO;
+ rebase_swizzle[3] = MESA_FORMAT_SWIZZLE_W;
+ } else if (_mesa_get_format_base_format(rb_format) != rb->_BaseFormat) {
+ needs_rebase =
+ _mesa_compute_rgba2base2rgba_component_mapping(rb->_BaseFormat,
+ rebase_swizzle);
+ } else {
+ needs_rebase = false;
}
- if (!transferOps) {
- /* Try the optimized paths first. */
- if (fast_read_rgba_pixels_memcpy(ctx, x, y, width, height,
- format, type, pixels, packing,
- transferOps)) {
- return;
+ /* Since _mesa_format_convert does not handle transferOps we need to handle
+ * them before we call the function. This requires to convert to RGBA float
+ * first so we can call _mesa_apply_rgba_transfer_ops. If the dst format is
+ * integer transferOps do not apply.
+ *
+ * Converting to luminance also requires converting to RGBA first, so we can
+ * then compute luminance values as L=R+G+B. Notice that this is different
+ * from GetTexImage, where we compute L=R.
+ */
+ assert(!transferOps || (transferOps && !dst_is_integer));
+
+ needs_rgba = transferOps || convert_rgb_to_lum;
+ rgba = NULL;
+ if (needs_rgba) {
+ uint32_t rgba_format;
+ int rgba_stride;
+ bool need_convert;
+
+ /* Convert to RGBA float or int/uint depending on the type of the src */
+ if (dst_is_integer) {
+ src_is_uint = _mesa_is_format_unsigned(rb_format);
+ if (src_is_uint) {
+ rgba_format = RGBA32_UINT;
+ rgba_stride = width * 4 * sizeof(GLuint);
+ } else {
+ rgba_format = RGBA32_INT;
+ rgba_stride = width * 4 * sizeof(GLint);
+ }
+ } else {
+ rgba_format = RGBA32_FLOAT;
+ rgba_stride = width * 4 * sizeof(GLfloat);
+ }
+
+ /* If we are lucky and the dst format matches the RGBA format we need to
+ * convert to, then we can convert directly into the dst buffer and avoid
+ * the final conversion/copy from the rgba buffer to the dst buffer.
+ */
+ if (dst_format == rgba_format &&
+ dst_stride == rgba_stride) {
+ need_convert = false;
+ rgba = dst;
+ } else {
+ need_convert = true;
+ rgba = malloc(height * rgba_stride);
+ if (!rgba) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
+ goto done_unmap;
+ }
+ }
+
+ /* Convert to RGBA now */
+ _mesa_format_convert(rgba, rgba_format, rgba_stride,
+ map, rb_format, rb_stride,
+ width, height,
+ needs_rebase ? rebase_swizzle : NULL);
+
+ /* Handle transfer ops if necessary */
+ if (transferOps)
+ _mesa_apply_rgba_transfer_ops(ctx, transferOps, width * height, rgba);
+
+ /* If we had to rebase, we have already taken care of that */
+ needs_rebase = false;
+
+ /* If we were lucky and our RGBA conversion matches the dst format, then
+ * we are done.
+ */
+ if (!need_convert)
+ goto done_swap;
+
+ /* Otherwise, we need to convert from RGBA to dst next */
+ src = rgba;
+ src_format = rgba_format;
+ src_stride = rgba_stride;
+ } else {
+ /* No RGBA conversion needed, convert directly to dst */
+ src = map;
+ src_format = rb_format;
+ src_stride = rb_stride;
+ }
+
+ /* Do the conversion.
+ *
+ * If the dst format is Luminance, we need to do the conversion by computing
+ * L=R+G+B values.
+ */
+ if (!convert_rgb_to_lum) {
+ _mesa_format_convert(dst, dst_format, dst_stride,
+ src, src_format, src_stride,
+ width, height,
+ needs_rebase ? rebase_swizzle : NULL);
+ } else if (!dst_is_integer) {
+ /* Compute float Luminance values from RGBA float */
+ int luminance_stride, luminance_bytes;
+ void *luminance;
+ uint32_t luminance_format;
+
+ luminance_stride = width * sizeof(GLfloat);
+ if (format == GL_LUMINANCE_ALPHA)
+ luminance_stride *= 2;
+ luminance_bytes = height * luminance_stride;
+ luminance = malloc(luminance_bytes);
+ if (!luminance) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
+ free(rgba);
+ goto done_unmap;
}
+ _mesa_pack_luminance_from_rgba_float(width * height, src,
+ luminance, format, transferOps);
+
+ /* Convert from Luminance float to dst (this will hadle type conversion
+ * from float to the type of dst if necessary)
+ */
+ luminance_format = _mesa_format_from_format_and_type(format, GL_FLOAT);
+ _mesa_format_convert(dst, dst_format, dst_stride,
+ luminance, luminance_format, luminance_stride,
+ width, height, NULL);
+ free(luminance);
+ } else {
+ _mesa_pack_luminance_from_rgba_integer(width * height, src, !src_is_uint,
+ dst, format, type);
}
- slow_read_rgba_pixels(ctx, x, y, width, height,
- format, type, pixels, packing, transferOps);
+ free(rgba);
+
+done_swap:
+ /* Handle byte swapping if required */
+ if (packing->SwapBytes) {
+ _mesa_swap_bytes_2d_image(format, type, packing,
+ width, height, dst, dst);
+ }
+
+done_unmap:
+ ctx->Driver.UnmapRenderbuffer(ctx, rb);
}
/**
if (rb != stencilRb)
return GL_FALSE;
- if (rb->Format != MESA_FORMAT_Z24_S8 &&
- rb->Format != MESA_FORMAT_S8_Z24)
+ if (rb->Format != MESA_FORMAT_S8_UINT_Z24_UNORM &&
+ rb->Format != MESA_FORMAT_Z24_UNORM_S8_UINT)
return GL_FALSE;
ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
- &map, &stride);
+ &map, &stride, fb->FlipY);
if (!map) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
return GL_TRUE; /* don't bother trying the slow path */
struct gl_framebuffer *fb = ctx->ReadBuffer;
struct gl_renderbuffer *depthRb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
struct gl_renderbuffer *stencilRb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
- GLubyte *depthMap, *stencilMap;
+ GLubyte *depthMap, *stencilMap, *stencilVals;
int depthStride, stencilStride, i, j;
if (_mesa_get_format_datatype(depthRb->Format) != GL_UNSIGNED_NORMALIZED)
return GL_FALSE;
ctx->Driver.MapRenderbuffer(ctx, depthRb, x, y, width, height,
- GL_MAP_READ_BIT, &depthMap, &depthStride);
+ GL_MAP_READ_BIT, &depthMap, &depthStride, fb->FlipY);
if (!depthMap) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
return GL_TRUE; /* don't bother trying the slow path */
}
ctx->Driver.MapRenderbuffer(ctx, stencilRb, x, y, width, height,
- GL_MAP_READ_BIT, &stencilMap, &stencilStride);
+ GL_MAP_READ_BIT, &stencilMap, &stencilStride, fb->FlipY);
if (!stencilMap) {
ctx->Driver.UnmapRenderbuffer(ctx, depthRb);
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
return GL_TRUE; /* don't bother trying the slow path */
}
- for (j = 0; j < height; j++) {
- GLubyte stencilVals[MAX_WIDTH];
+ stencilVals = malloc(width * sizeof(GLubyte));
- _mesa_unpack_uint_z_row(depthRb->Format, width, depthMap, dst);
- _mesa_unpack_ubyte_stencil_row(stencilRb->Format, width,
- stencilMap, stencilVals);
+ if (stencilVals) {
+ for (j = 0; j < height; j++) {
+ _mesa_unpack_uint_z_row(depthRb->Format, width, depthMap, dst);
+ _mesa_unpack_ubyte_stencil_row(stencilRb->Format, width,
+ stencilMap, stencilVals);
- for (i = 0; i < width; i++) {
- dst[i] = (dst[i] & 0xffffff00) | stencilVals[i];
- }
+ for (i = 0; i < width; i++) {
+ dst[i] = (dst[i] & 0xffffff00) | stencilVals[i];
+ }
- depthMap += depthStride;
- stencilMap += stencilStride;
- dst += dstStride / 4;
+ depthMap += depthStride;
+ stencilMap += stencilStride;
+ dst += dstStride / 4;
+ }
+ }
+ else {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
}
+ free(stencilVals);
+
ctx->Driver.UnmapRenderbuffer(ctx, depthRb);
ctx->Driver.UnmapRenderbuffer(ctx, stencilRb);
struct gl_renderbuffer *stencilRb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
GLubyte *depthMap, *stencilMap;
int depthStride, stencilStride, j;
+ GLubyte *stencilVals;
+ GLfloat *depthVals;
+
/* The depth and stencil buffers might be separate, or a single buffer.
* If one buffer, only map it once.
*/
ctx->Driver.MapRenderbuffer(ctx, depthRb, x, y, width, height,
- GL_MAP_READ_BIT, &depthMap, &depthStride);
+ GL_MAP_READ_BIT, &depthMap, &depthStride, fb->FlipY);
if (!depthMap) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
return;
if (stencilRb != depthRb) {
ctx->Driver.MapRenderbuffer(ctx, stencilRb, x, y, width, height,
GL_MAP_READ_BIT, &stencilMap,
- &stencilStride);
+ &stencilStride, fb->FlipY);
if (!stencilMap) {
ctx->Driver.UnmapRenderbuffer(ctx, depthRb);
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
stencilStride = depthStride;
}
- for (j = 0; j < height; j++) {
- GLubyte stencilVals[MAX_WIDTH];
- GLfloat depthVals[MAX_WIDTH];
+ stencilVals = malloc(width * sizeof(GLubyte));
+ depthVals = malloc(width * sizeof(GLfloat));
- _mesa_unpack_float_z_row(depthRb->Format, width, depthMap, depthVals);
- _mesa_unpack_ubyte_stencil_row(stencilRb->Format, width,
- stencilMap, stencilVals);
+ if (stencilVals && depthVals) {
+ for (j = 0; j < height; j++) {
+ _mesa_unpack_float_z_row(depthRb->Format, width, depthMap, depthVals);
+ _mesa_unpack_ubyte_stencil_row(stencilRb->Format, width,
+ stencilMap, stencilVals);
- _mesa_pack_depth_stencil_span(ctx, width, type, (GLuint *)dst,
- depthVals, stencilVals, packing);
+ _mesa_pack_depth_stencil_span(ctx, width, type, (GLuint *)dst,
+ depthVals, stencilVals, packing);
- depthMap += depthStride;
- stencilMap += stencilStride;
- dst += dstStride;
+ depthMap += depthStride;
+ stencilMap += stencilStride;
+ dst += dstStride;
+ }
+ }
+ else {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
}
+ free(stencilVals);
+ free(depthVals);
+
ctx->Driver.UnmapRenderbuffer(ctx, depthRb);
if (stencilRb != depthRb) {
ctx->Driver.UnmapRenderbuffer(ctx, stencilRb);
const struct gl_pixelstore_attrib *packing )
{
const GLboolean scaleOrBias
- = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
+ = ctx->Pixel.DepthScale != 1.0F || ctx->Pixel.DepthBias != 0.0F;
const GLboolean stencilTransfer = ctx->Pixel.IndexShift
|| ctx->Pixel.IndexOffset || ctx->Pixel.MapStencilFlag;
GLubyte *dst;
const struct gl_pixelstore_attrib *packing,
GLvoid *pixels)
{
- struct gl_pixelstore_attrib clippedPacking = *packing;
-
if (ctx->NewState)
_mesa_update_state(ctx);
- /* Do all needed clipping here, so that we can forget about it later */
- if (_mesa_clip_readpixels(ctx, &x, &y, &width, &height, &clippedPacking)) {
-
- pixels = _mesa_map_pbo_dest(ctx, &clippedPacking, pixels);
-
- if (pixels) {
- switch (format) {
- case GL_STENCIL_INDEX:
- read_stencil_pixels(ctx, x, y, width, height, type, pixels,
- &clippedPacking);
- break;
- case GL_DEPTH_COMPONENT:
- read_depth_pixels(ctx, x, y, width, height, type, pixels,
- &clippedPacking);
- break;
- case GL_DEPTH_STENCIL_EXT:
- read_depth_stencil_pixels(ctx, x, y, width, height, type, pixels,
- &clippedPacking);
- break;
- default:
- /* all other formats should be color formats */
- read_rgba_pixels(ctx, x, y, width, height, format, type, pixels,
- &clippedPacking);
- }
+ pixels = _mesa_map_pbo_dest(ctx, packing, pixels);
- _mesa_unmap_pbo_dest(ctx, &clippedPacking);
+ if (pixels) {
+ /* Try memcpy first. */
+ if (readpixels_memcpy(ctx, x, y, width, height, format, type,
+ pixels, packing)) {
+ _mesa_unmap_pbo_dest(ctx, packing);
+ return;
}
- }
-}
-
-/**
- * Do error checking of the format/type parameters to glReadPixels and
- * glDrawPixels.
- * \param drawing if GL_TRUE do checking for DrawPixels, else do checking
- * for ReadPixels.
- * \return GL_TRUE if error detected, GL_FALSE if no errors
- */
-GLboolean
-_mesa_error_check_format_type(struct gl_context *ctx, GLenum format,
- GLenum type, GLboolean drawing)
-{
- const char *readDraw = drawing ? "Draw" : "Read";
- const GLboolean reading = !drawing;
-
- /* state validation should have already been done */
- ASSERT(ctx->NewState == 0x0);
+ /* Otherwise take the slow path. */
+ switch (format) {
+ case GL_STENCIL_INDEX:
+ read_stencil_pixels(ctx, x, y, width, height, type, pixels,
+ packing);
+ break;
+ case GL_DEPTH_COMPONENT:
+ read_depth_pixels(ctx, x, y, width, height, type, pixels,
+ packing);
+ break;
+ case GL_DEPTH_STENCIL_EXT:
+ read_depth_stencil_pixels(ctx, x, y, width, height, type, pixels,
+ packing);
+ break;
+ default:
+ /* all other formats should be color formats */
+ read_rgba_pixels(ctx, x, y, width, height, format, type, pixels,
+ packing);
+ }
- if (ctx->Extensions.EXT_packed_depth_stencil
- && type == GL_UNSIGNED_INT_24_8_EXT
- && format != GL_DEPTH_STENCIL_EXT) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "gl%sPixels(format is not GL_DEPTH_STENCIL_EXT)", readDraw);
- return GL_TRUE;
+ _mesa_unmap_pbo_dest(ctx, packing);
}
+}
- if (ctx->Extensions.ARB_depth_buffer_float
- && type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV
- && format != GL_DEPTH_STENCIL_EXT) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "gl%sPixels(format is not GL_DEPTH_STENCIL_EXT)", readDraw);
- return GL_TRUE;
- }
- /* basic combinations test */
- if (!_mesa_is_legal_format_and_type(ctx, format, type)) {
- _mesa_error(ctx, GL_INVALID_ENUM,
- "gl%sPixels(format or type)", readDraw);
- return GL_TRUE;
+static GLenum
+read_pixels_es3_error_check(struct gl_context *ctx, GLenum format, GLenum type,
+ const struct gl_renderbuffer *rb)
+{
+ const GLenum internalFormat = rb->InternalFormat;
+ const GLenum data_type = _mesa_get_format_datatype(rb->Format);
+ GLboolean is_unsigned_int = GL_FALSE;
+ GLboolean is_signed_int = GL_FALSE;
+ GLboolean is_float_depth = (internalFormat == GL_DEPTH_COMPONENT32F) ||
+ (internalFormat == GL_DEPTH32F_STENCIL8);
+
+ is_unsigned_int = _mesa_is_enum_format_unsigned_int(internalFormat);
+ if (!is_unsigned_int) {
+ is_signed_int = _mesa_is_enum_format_signed_int(internalFormat);
}
- /* additional checks */
switch (format) {
- case GL_RG:
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
- case GL_LUMINANCE:
- case GL_LUMINANCE_ALPHA:
- case GL_RGB:
- case GL_BGR:
case GL_RGBA:
- case GL_BGRA:
- case GL_ABGR_EXT:
- case GL_RED_INTEGER_EXT:
- case GL_GREEN_INTEGER_EXT:
- case GL_BLUE_INTEGER_EXT:
- case GL_ALPHA_INTEGER_EXT:
- case GL_RGB_INTEGER_EXT:
- case GL_RGBA_INTEGER_EXT:
- case GL_BGR_INTEGER_EXT:
- case GL_BGRA_INTEGER_EXT:
- case GL_LUMINANCE_INTEGER_EXT:
- case GL_LUMINANCE_ALPHA_INTEGER_EXT:
- if (!drawing) {
- /* reading */
- if (!_mesa_source_buffer_exists(ctx, GL_COLOR)) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glReadPixels(no color buffer)");
- return GL_TRUE;
+ if (type == GL_FLOAT && data_type == GL_FLOAT)
+ return GL_NO_ERROR; /* EXT_color_buffer_float */
+ if (type == GL_UNSIGNED_BYTE && data_type == GL_UNSIGNED_NORMALIZED)
+ return GL_NO_ERROR;
+ if (internalFormat == GL_RGB10_A2 &&
+ type == GL_UNSIGNED_INT_2_10_10_10_REV)
+ return GL_NO_ERROR;
+ if (internalFormat == GL_RGB10_A2UI && type == GL_UNSIGNED_BYTE)
+ return GL_NO_ERROR;
+ if (type == GL_UNSIGNED_SHORT) {
+ switch (internalFormat) {
+ case GL_R16:
+ case GL_RG16:
+ case GL_RGB16:
+ case GL_RGBA16:
+ if (_mesa_has_EXT_texture_norm16(ctx))
+ return GL_NO_ERROR;
}
}
- break;
- case GL_COLOR_INDEX:
- if (drawing) {
- if (ctx->PixelMaps.ItoR.Size == 0 ||
- ctx->PixelMaps.ItoG.Size == 0 ||
- ctx->PixelMaps.ItoB.Size == 0) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glDrawPixels(drawing color index pixels into RGB buffer)");
- return GL_TRUE;
+ if (type == GL_SHORT) {
+ switch (internalFormat) {
+ case GL_R16_SNORM:
+ case GL_RG16_SNORM:
+ case GL_RGBA16_SNORM:
+ if (_mesa_has_EXT_texture_norm16(ctx) &&
+ _mesa_has_EXT_render_snorm(ctx))
+ return GL_NO_ERROR;
}
}
- else {
- /* reading */
- if (!_mesa_source_buffer_exists(ctx, GL_COLOR)) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glReadPixels(no color buffer)");
- return GL_TRUE;
+ if (type == GL_BYTE) {
+ switch (internalFormat) {
+ case GL_R8_SNORM:
+ case GL_RG8_SNORM:
+ case GL_RGBA8_SNORM:
+ if (_mesa_has_EXT_render_snorm(ctx))
+ return GL_NO_ERROR;
+ }
+ }
+ if (type == GL_UNSIGNED_BYTE) {
+ switch (internalFormat) {
+ case GL_R8_SNORM:
+ case GL_RG8_SNORM:
+ case GL_RGBA8_SNORM:
+ if (_mesa_has_EXT_render_snorm(ctx))
+ return GL_NO_ERROR;
}
- /* We no longer support CI-mode color buffers so trying to read
- * GL_COLOR_INDEX pixels is always an error.
- */
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glReadPixels(color buffer is RGB)");
- return GL_TRUE;
}
break;
- case GL_STENCIL_INDEX:
- if ((drawing && !_mesa_dest_buffer_exists(ctx, format)) ||
- (reading && !_mesa_source_buffer_exists(ctx, format))) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "gl%sPixels(no stencil buffer)", readDraw);
- return GL_TRUE;
+ case GL_BGRA:
+ /* GL_EXT_read_format_bgra */
+ if (type == GL_UNSIGNED_BYTE ||
+ type == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
+ type == GL_UNSIGNED_SHORT_1_5_5_5_REV)
+ return GL_NO_ERROR;
+ break;
+ case GL_RGBA_INTEGER:
+ if ((is_signed_int && type == GL_INT) ||
+ (is_unsigned_int && type == GL_UNSIGNED_INT))
+ return GL_NO_ERROR;
+ break;
+ case GL_DEPTH_STENCIL:
+ switch (type) {
+ case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
+ if (is_float_depth)
+ return GL_NO_ERROR;
+ break;
+ case GL_UNSIGNED_INT_24_8:
+ if (!is_float_depth)
+ return GL_NO_ERROR;
+ break;
+ default:
+ return GL_INVALID_ENUM;
}
break;
case GL_DEPTH_COMPONENT:
- if ((drawing && !_mesa_dest_buffer_exists(ctx, format))) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "gl%sPixels(no depth buffer)", readDraw);
- return GL_TRUE;
+ switch (type) {
+ case GL_FLOAT:
+ if (is_float_depth)
+ return GL_NO_ERROR;
+ break;
+ case GL_UNSIGNED_SHORT:
+ case GL_UNSIGNED_INT:
+ case GL_UNSIGNED_INT_24_8:
+ if (!is_float_depth)
+ return GL_NO_ERROR;
+ break;
+ default:
+ return GL_INVALID_ENUM;
}
break;
- case GL_DEPTH_STENCIL_EXT:
- /* Check validity of the type first. */
+ case GL_STENCIL_INDEX:
switch (type) {
- case GL_UNSIGNED_INT_24_8_EXT:
- if (!ctx->Extensions.EXT_packed_depth_stencil) {
- _mesa_error(ctx, GL_INVALID_ENUM, "gl%sPixels(type)", readDraw);
- return GL_TRUE;
- }
- break;
- case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
- if (!ctx->Extensions.ARB_depth_buffer_float) {
- _mesa_error(ctx, GL_INVALID_ENUM, "gl%sPixels(type)", readDraw);
- return GL_TRUE;
- }
- break;
- default:
- _mesa_error(ctx, GL_INVALID_ENUM, "gl%sPixels(type)", readDraw);
- return GL_TRUE;
- }
- if ((drawing && !_mesa_dest_buffer_exists(ctx, format)) ||
- (reading && !_mesa_source_buffer_exists(ctx, format))) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "gl%sPixels(no depth or stencil buffer)", readDraw);
- return GL_TRUE;
+ case GL_UNSIGNED_BYTE:
+ return GL_NO_ERROR;
+ default:
+ return GL_INVALID_ENUM;
}
break;
- default:
- /* this should have been caught in _mesa_is_legal_format_type() */
- _mesa_problem(ctx, "unexpected format in _mesa_%sPixels", readDraw);
- return GL_TRUE;
}
- /* no errors */
- return GL_FALSE;
+ return GL_INVALID_OPERATION;
}
-
-void GLAPIENTRY
-_mesa_ReadnPixelsARB( GLint x, GLint y, GLsizei width, GLsizei height,
- GLenum format, GLenum type, GLsizei bufSize,
- GLvoid *pixels )
+static ALWAYS_INLINE void
+read_pixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
+ GLenum type, GLsizei bufSize, GLvoid *pixels, bool no_error)
{
+ GLenum err = GL_NO_ERROR;
+ struct gl_renderbuffer *rb;
+ struct gl_pixelstore_attrib clippedPacking;
+
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
- FLUSH_CURRENT(ctx, 0);
+ FLUSH_VERTICES(ctx, 0);
if (MESA_VERBOSE & VERBOSE_API)
_mesa_debug(ctx, "glReadPixels(%d, %d, %s, %s, %p)\n",
width, height,
- _mesa_lookup_enum_by_nr(format),
- _mesa_lookup_enum_by_nr(type),
+ _mesa_enum_to_string(format),
+ _mesa_enum_to_string(type),
pixels);
- if (width < 0 || height < 0) {
+ if (!no_error && (width < 0 || height < 0)) {
_mesa_error( ctx, GL_INVALID_VALUE,
"glReadPixels(width=%d height=%d)", width, height );
return;
if (ctx->NewState)
_mesa_update_state(ctx);
- if (_mesa_error_check_format_type(ctx, format, type, GL_FALSE)) {
- /* found an error */
+ if (!no_error && ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
+ _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
+ "glReadPixels(incomplete framebuffer)" );
return;
}
- /* Check that the destination format and source buffer are both
- * integer-valued or both non-integer-valued.
- */
- if (ctx->Extensions.EXT_texture_integer && _mesa_is_color_format(format)) {
- const struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
- const GLboolean srcInteger = _mesa_is_format_integer_color(rb->Format);
- const GLboolean dstInteger = _mesa_is_integer_format(format);
- if (dstInteger != srcInteger) {
+ rb = _mesa_get_read_renderbuffer_for_format(ctx, format);
+ if (!no_error) {
+ if (rb == NULL) {
_mesa_error(ctx, GL_INVALID_OPERATION,
- "glReadPixels(integer / non-integer format mismatch");
+ "glReadPixels(read buffer)");
return;
}
- }
- if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
- _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
- "glReadPixels(incomplete framebuffer)" );
- return;
- }
+ /* OpenGL ES 1.x and OpenGL ES 2.0 impose additional restrictions on the
+ * combinations of format and type that can be used.
+ *
+ * Technically, only two combinations are actually allowed:
+ * GL_RGBA/GL_UNSIGNED_BYTE, and some implementation-specific internal
+ * preferred combination. This code doesn't know what that preferred
+ * combination is, and Mesa can handle anything valid. Just work instead.
+ */
+ if (_mesa_is_gles(ctx)) {
+ if (ctx->API == API_OPENGLES2 &&
+ _mesa_is_color_format(format) &&
+ _mesa_get_color_read_format(ctx, NULL, "glReadPixels") == format &&
+ _mesa_get_color_read_type(ctx, NULL, "glReadPixels") == type) {
+ err = GL_NO_ERROR;
+ } else if (ctx->Version < 30) {
+ err = _mesa_es_error_check_format_and_type(ctx, format, type, 2);
+ if (err == GL_NO_ERROR) {
+ if (type == GL_FLOAT || type == GL_HALF_FLOAT_OES) {
+ err = GL_INVALID_OPERATION;
+ }
+ }
+ } else {
+ err = read_pixels_es3_error_check(ctx, format, type, rb);
+ }
- if (!_mesa_source_buffer_exists(ctx, format)) {
- _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(no readbuffer)");
- return;
+ if (err != GL_NO_ERROR) {
+ _mesa_error(ctx, err, "glReadPixels(invalid format %s and/or type %s)",
+ _mesa_enum_to_string(format),
+ _mesa_enum_to_string(type));
+ return;
+ }
+ }
+
+ err = _mesa_error_check_format_and_type(ctx, format, type);
+ if (err != GL_NO_ERROR) {
+ _mesa_error(ctx, err, "glReadPixels(invalid format %s and/or type %s)",
+ _mesa_enum_to_string(format),
+ _mesa_enum_to_string(type));
+ return;
+ }
+
+ if (_mesa_is_user_fbo(ctx->ReadBuffer) &&
+ ctx->ReadBuffer->Visual.samples > 0) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(multisample FBO)");
+ return;
+ }
+
+ if (!_mesa_source_buffer_exists(ctx, format)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(no readbuffer)");
+ return;
+ }
+
+ /* Check that the destination format and source buffer are both
+ * integer-valued or both non-integer-valued.
+ */
+ if (ctx->Extensions.EXT_texture_integer && _mesa_is_color_format(format)) {
+ const struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
+ const GLboolean srcInteger = _mesa_is_format_integer_color(rb->Format);
+ const GLboolean dstInteger = _mesa_is_enum_format_integer(format);
+ if (dstInteger != srcInteger) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glReadPixels(integer / non-integer format mismatch");
+ return;
+ }
+ }
}
- if (width == 0 || height == 0)
+ /* Do all needed clipping here, so that we can forget about it later */
+ clippedPacking = ctx->Pack;
+ if (!_mesa_clip_readpixels(ctx, &x, &y, &width, &height, &clippedPacking))
return; /* nothing to do */
- if (!_mesa_validate_pbo_access(2, &ctx->Pack, width, height, 1,
- format, type, bufSize, pixels)) {
- if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glReadPixels(out of bounds PBO access)");
- } else {
- _mesa_error(ctx, GL_INVALID_OPERATION,
- "glReadnPixelsARB(out of bounds access:"
- " bufSize (%d) is too small)", bufSize);
+ if (!no_error) {
+ if (!_mesa_validate_pbo_access(2, &ctx->Pack, width, height, 1,
+ format, type, bufSize, pixels)) {
+ if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glReadPixels(out of bounds PBO access)");
+ } else {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glReadnPixelsARB(out of bounds access:"
+ " bufSize (%d) is too small)", bufSize);
+ }
+ return;
}
- return;
- }
- if (_mesa_is_bufferobj(ctx->Pack.BufferObj) &&
- _mesa_bufferobj_mapped(ctx->Pack.BufferObj)) {
- /* buffer is mapped - that's an error */
- _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(PBO is mapped)");
- return;
+ if (_mesa_is_bufferobj(ctx->Pack.BufferObj) &&
+ _mesa_check_disallowed_mapping(ctx->Pack.BufferObj)) {
+ /* buffer is mapped - that's an error */
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(PBO is mapped)");
+ return;
+ }
}
ctx->Driver.ReadPixels(ctx, x, y, width, height,
- format, type, &ctx->Pack, pixels);
+ format, type, &clippedPacking, pixels);
+}
+
+void GLAPIENTRY
+_mesa_ReadnPixelsARB_no_error(GLint x, GLint y, GLsizei width, GLsizei height,
+ GLenum format, GLenum type, GLsizei bufSize,
+ GLvoid *pixels)
+{
+ read_pixels(x, y, width, height, format, type, bufSize, pixels, true);
+}
+
+void GLAPIENTRY
+_mesa_ReadnPixelsARB(GLint x, GLint y, GLsizei width, GLsizei height,
+ GLenum format, GLenum type, GLsizei bufSize,
+ GLvoid *pixels)
+{
+ read_pixels(x, y, width, height, format, type, bufSize, pixels, false);
+}
+
+void GLAPIENTRY
+_mesa_ReadPixels_no_error(GLint x, GLint y, GLsizei width, GLsizei height,
+ GLenum format, GLenum type, GLvoid *pixels)
+{
+ _mesa_ReadnPixelsARB_no_error(x, y, width, height, format, type, INT_MAX,
+ pixels);
}
void GLAPIENTRY
-_mesa_ReadPixels( GLint x, GLint y, GLsizei width, GLsizei height,
- GLenum format, GLenum type, GLvoid *pixels )
+_mesa_ReadPixels(GLint x, GLint y, GLsizei width, GLsizei height,
+ GLenum format, GLenum type, GLvoid *pixels)
{
_mesa_ReadnPixelsARB(x, y, width, height, format, type, INT_MAX, pixels);
}
projects / mesa.git / blobdiff