X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Fbuffers.c;h=2bdbf41be5d1a33bdf803224205394663a0be3bf;hb=5314afa27aa8d9260ed0b0a42a6d6050313953da;hp=a75c9c2e782e8c2dbab0b6cb186208346aa4b959;hpb=424b1210d951c206e7c2fb8f2778acbd384eb247;p=mesa.git diff --git a/src/mesa/main/buffers.c b/src/mesa/main/buffers.c index a75c9c2e782..2bdbf41be5d 100644 --- a/src/mesa/main/buffers.c +++ b/src/mesa/main/buffers.c @@ -1,6 +1,5 @@ /* * Mesa 3-D graphics library - * Version: 7.1 * * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. * @@ -17,9 +16,10 @@ * 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. */ @@ -35,6 +35,7 @@ #include "colormac.h" #include "context.h" #include "enums.h" +#include "fbobject.h" #include "mtypes.h" @@ -51,14 +52,14 @@ * \return bitmask of BUFFER_BIT_* flags */ static GLbitfield -supported_buffer_bitmask(const struct gl_context *ctx, const struct gl_framebuffer *fb) +supported_buffer_bitmask(const struct gl_context *ctx, + const struct gl_framebuffer *fb) { GLbitfield mask = 0x0; - if (fb->Name > 0) { + if (_mesa_is_user_fbo(fb)) { /* A user-created renderbuffer */ GLuint i; - ASSERT(ctx->Extensions.EXT_framebuffer_object); for (i = 0; i < ctx->Const.MaxColorAttachments; i++) { mask |= (BUFFER_BIT_COLOR0 << i); } @@ -92,7 +93,7 @@ supported_buffer_bitmask(const struct gl_context *ctx, const struct gl_framebuff * GL_FRONT_AND_BACK), return the corresponding bitmask of BUFFER_BIT_* flags. */ static GLbitfield -draw_buffer_enum_to_bitmask(GLenum buffer) +draw_buffer_enum_to_bitmask(const struct gl_context *ctx, GLenum buffer) { switch (buffer) { case GL_NONE: @@ -100,6 +101,21 @@ draw_buffer_enum_to_bitmask(GLenum buffer) case GL_FRONT: return BUFFER_BIT_FRONT_LEFT | BUFFER_BIT_FRONT_RIGHT; case GL_BACK: + if (_mesa_is_gles3(ctx)) { + /* Page 181 (page 192 of the PDF) in section 4.2.1 of the OpenGL + * ES 3.0.1 specification says: + * + * "When draw buffer zero is BACK, color values are written + * into the sole buffer for single-buffered contexts, or into + * the back buffer for double-buffered contexts." + * + * Since there is no stereo rendering in ES 3.0, only return the + * LEFT bits. This also satisfies the "n must be 1" requirement. + */ + if (ctx->DrawBuffer->Visual.doubleBufferMode) + return BUFFER_BIT_BACK_LEFT; + return BUFFER_BIT_FRONT_LEFT; + } return BUFFER_BIT_BACK_LEFT | BUFFER_BIT_BACK_RIGHT; case GL_RIGHT: return BUFFER_BIT_FRONT_RIGHT | BUFFER_BIT_BACK_RIGHT; @@ -204,13 +220,13 @@ read_buffer_enum_to_index(GLenum buffer) * Called by glDrawBuffer(). * Specify which renderbuffer(s) to draw into for the first color output. * can name zero, one, two or four renderbuffers! - * \sa _mesa_DrawBuffersARB + * \sa _mesa_DrawBuffers * * \param buffer buffer token such as GL_LEFT or GL_FRONT_AND_BACK, etc. * * Note that the behaviour of this function depends on whether the - * current ctx->DrawBuffer is a window-system framebuffer (Name=0) or - * a user-created framebuffer object (Name!=0). + * current ctx->DrawBuffer is a window-system framebuffer or a user-created + * framebuffer object. * In the former case, we update the per-context ctx->Color.DrawBuffer * state var _and_ the FB's ColorDrawBuffer state. * In the later case, we update the FB's ColorDrawBuffer state only. @@ -227,7 +243,8 @@ _mesa_DrawBuffer(GLenum buffer) { GLbitfield destMask; GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); /* too complex... */ + + FLUSH_VERTICES(ctx, 0); if (MESA_VERBOSE & VERBOSE_API) { _mesa_debug(ctx, "glDrawBuffer %s\n", _mesa_lookup_enum_by_nr(buffer)); @@ -239,10 +256,11 @@ _mesa_DrawBuffer(GLenum buffer) else { const GLbitfield supportedMask = supported_buffer_bitmask(ctx, ctx->DrawBuffer); - destMask = draw_buffer_enum_to_bitmask(buffer); + destMask = draw_buffer_enum_to_bitmask(ctx, buffer); if (destMask == BAD_MASK) { /* totally bogus buffer */ - _mesa_error(ctx, GL_INVALID_ENUM, "glDrawBuffer(buffer=0x%x)", buffer); + _mesa_error(ctx, GL_INVALID_ENUM, + "glDrawBuffer(buffer=0x%x)", buffer); return; } destMask &= supportedMask; @@ -277,16 +295,21 @@ _mesa_DrawBuffer(GLenum buffer) * GL_FRONT_AND_BACK is illegal. */ void GLAPIENTRY -_mesa_DrawBuffersARB(GLsizei n, const GLenum *buffers) +_mesa_DrawBuffers(GLsizei n, const GLenum *buffers) { GLint output; GLbitfield usedBufferMask, supportedMask; GLbitfield destMask[MAX_DRAW_BUFFERS]; GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + + FLUSH_VERTICES(ctx, 0); /* Turns out n==0 is a valid input that should not produce an error. * The remaining code below correctly handles the n==0 case. + * + * From the OpenGL 3.0 specification, page 258: + * "An INVALID_VALUE error is generated if n is greater than + * MAX_DRAW_BUFFERS." */ if (n < 0 || n > (GLsizei) ctx->Const.MaxDrawBuffers) { _mesa_error(ctx, GL_INVALID_VALUE, "glDrawBuffersARB(n)"); @@ -296,26 +319,94 @@ _mesa_DrawBuffersARB(GLsizei n, const GLenum *buffers) supportedMask = supported_buffer_bitmask(ctx, ctx->DrawBuffer); usedBufferMask = 0x0; + /* From the ES 3.0 specification, page 180: + * "If the GL is bound to the default framebuffer, then n must be 1 + * and the constant must be BACK or NONE." + */ + if (_mesa_is_gles3(ctx) && _mesa_is_winsys_fbo(ctx->DrawBuffer) && + (n != 1 || (buffers[0] != GL_NONE && buffers[0] != GL_BACK))) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawBuffers(buffer)"); + return; + } + /* complicated error checking... */ for (output = 0; output < n; output++) { if (buffers[output] == GL_NONE) { destMask[output] = 0x0; } else { - destMask[output] = draw_buffer_enum_to_bitmask(buffers[output]); - if (destMask[output] == BAD_MASK - || _mesa_bitcount(destMask[output]) > 1) { + /* Page 259 (page 275 of the PDF) in section 4.2.1 of the OpenGL 3.0 + * spec (20080923) says: + * + * "If the GL is bound to a framebuffer object and DrawBuffers is + * supplied with [...] COLOR_ATTACHMENTm where m is greater than + * or equal to the value of MAX_COLOR_ATTACHMENTS, then the error + * INVALID_OPERATION results." + */ + if (_mesa_is_user_fbo(ctx->DrawBuffer) && buffers[output] >= + GL_COLOR_ATTACHMENT0 + ctx->Const.MaxDrawBuffers) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawBuffersARB(buffer)"); + return; + } + + destMask[output] = draw_buffer_enum_to_bitmask(ctx, buffers[output]); + + /* From the OpenGL 3.0 specification, page 258: + * "Each buffer listed in bufs must be one of the values from tables + * 4.5 or 4.6. Otherwise, an INVALID_ENUM error is generated. + */ + if (destMask[output] == BAD_MASK) { _mesa_error(ctx, GL_INVALID_ENUM, "glDrawBuffersARB(buffer)"); return; } + + /* From the OpenGL 3.0 specification, page 259: + * "For both the default framebuffer and framebuffer objects, the + * constants FRONT, BACK, LEFT, RIGHT, and FRONT_AND_BACK are not + * valid in the bufs array passed to DrawBuffers, and will result in + * the error INVALID_OPERATION. This restriction is because these + * constants may themselves refer to multiple buffers, as shown in + * table 4.4." + */ + if (_mesa_bitcount(destMask[output]) > 1) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawBuffersARB(buffer)"); + return; + } + + /* From the OpenGL 3.0 specification, page 259: + * "If the GL is bound to the default framebuffer and DrawBuffers is + * supplied with a constant (other than NONE) that does not indicate + * any of the color buffers allocated to the GL context by the window + * system, the error INVALID_OPERATION will be generated. + * + * If the GL is bound to a framebuffer object and DrawBuffers is + * supplied with a constant from table 4.6 [...] then the error + * INVALID_OPERATION results." + */ destMask[output] &= supportedMask; if (destMask[output] == 0) { _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawBuffersARB(unsupported buffer)"); return; } + + /* ES 3.0 is even more restrictive. From the ES 3.0 spec, page 180: + * "If the GL is bound to a framebuffer object, the ith buffer listed + * in bufs must be COLOR_ATTACHMENTi or NONE. [...] INVALID_OPERATION." + */ + if (_mesa_is_gles3(ctx) && _mesa_is_user_fbo(ctx->DrawBuffer) && + buffers[output] != GL_NONE && + buffers[output] != GL_COLOR_ATTACHMENT0 + output) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawBuffers(buffer)"); + return; + } + + /* From the OpenGL 3.0 specification, page 258: + * "Except for NONE, a buffer may not appear more than once in the + * array pointed to by bufs. Specifying a buffer more then once will + * result in the error INVALID_OPERATION." + */ if (destMask[output] & usedBufferMask) { - /* can't specify a dest buffer more than once! */ _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawBuffersARB(duplicated buffer)"); return; @@ -340,6 +431,7 @@ _mesa_DrawBuffersARB(GLsizei n, const GLenum *buffers) ctx->Driver.DrawBuffer(ctx, n > 0 ? buffers[0] : GL_NONE); } + /** * Performs necessary state updates when _mesa_drawbuffers makes an * actual change. @@ -349,18 +441,17 @@ updated_drawbuffers(struct gl_context *ctx) { FLUSH_VERTICES(ctx, _NEW_BUFFERS); -#if FEATURE_GL - if (ctx->API == API_OPENGL && !ctx->Extensions.ARB_ES2_compatibility) { + if (ctx->API == API_OPENGL_COMPAT && !ctx->Extensions.ARB_ES2_compatibility) { struct gl_framebuffer *fb = ctx->DrawBuffer; /* Flag the FBO as requiring validation. */ - if (fb->Name != 0) { + if (_mesa_is_user_fbo(fb)) { fb->_Status = 0; } } -#endif } + /** * Helper function to set the GL_DRAW_BUFFER state in the context and * current FBO. Called via glDrawBuffer(), glDrawBuffersARB() @@ -381,13 +472,14 @@ _mesa_drawbuffers(struct gl_context *ctx, GLuint n, const GLenum *buffers, { struct gl_framebuffer *fb = ctx->DrawBuffer; GLbitfield mask[MAX_DRAW_BUFFERS]; + GLuint buf; if (!destMask) { /* compute destMask values now */ const GLbitfield supportedMask = supported_buffer_bitmask(ctx, fb); GLuint output; for (output = 0; output < n; output++) { - mask[output] = draw_buffer_enum_to_bitmask(buffers[output]); + mask[output] = draw_buffer_enum_to_bitmask(ctx, buffers[output]); ASSERT(mask[output] != BAD_MASK); mask[output] &= supportedMask; } @@ -401,7 +493,7 @@ _mesa_drawbuffers(struct gl_context *ctx, GLuint n, const GLenum *buffers, if (n == 1) { GLuint count = 0, destMask0 = destMask[0]; while (destMask0) { - GLint bufIndex = _mesa_ffs(destMask0) - 1; + GLint bufIndex = ffs(destMask0) - 1; if (fb->_ColorDrawBufferIndexes[count] != bufIndex) { updated_drawbuffers(ctx); fb->_ColorDrawBufferIndexes[count] = bufIndex; @@ -410,16 +502,13 @@ _mesa_drawbuffers(struct gl_context *ctx, GLuint n, const GLenum *buffers, destMask0 &= ~(1 << bufIndex); } fb->ColorDrawBuffer[0] = buffers[0]; - if (fb->_NumColorDrawBuffers != count) { - updated_drawbuffers(ctx); - fb->_NumColorDrawBuffers = count; - } + fb->_NumColorDrawBuffers = count; } else { - GLuint buf, count = 0; + GLuint count = 0; for (buf = 0; buf < n; buf++ ) { if (destMask[buf]) { - GLint bufIndex = _mesa_ffs(destMask[buf]) - 1; + GLint bufIndex = ffs(destMask[buf]) - 1; /* only one bit should be set in the destMask[buf] field */ ASSERT(_mesa_bitcount(destMask[buf]) == 1); if (fb->_ColorDrawBufferIndexes[buf] != bufIndex) { @@ -436,21 +525,22 @@ _mesa_drawbuffers(struct gl_context *ctx, GLuint n, const GLenum *buffers, } fb->ColorDrawBuffer[buf] = buffers[buf]; } - /* set remaining outputs to -1 (GL_NONE) */ - while (buf < ctx->Const.MaxDrawBuffers) { - if (fb->_ColorDrawBufferIndexes[buf] != -1) { - updated_drawbuffers(ctx); - fb->_ColorDrawBufferIndexes[buf] = -1; - } - fb->ColorDrawBuffer[buf] = GL_NONE; - buf++; - } fb->_NumColorDrawBuffers = count; } - if (fb->Name == 0) { + /* set remaining outputs to -1 (GL_NONE) */ + for (buf = fb->_NumColorDrawBuffers; buf < ctx->Const.MaxDrawBuffers; buf++) { + if (fb->_ColorDrawBufferIndexes[buf] != -1) { + updated_drawbuffers(ctx); + fb->_ColorDrawBufferIndexes[buf] = -1; + } + } + for (buf = n; buf < ctx->Const.MaxDrawBuffers; buf++) { + fb->ColorDrawBuffer[buf] = GL_NONE; + } + + if (_mesa_is_winsys_fbo(fb)) { /* also set context drawbuffer state */ - GLuint buf; for (buf = 0; buf < ctx->Const.MaxDrawBuffers; buf++) { if (ctx->Color.DrawBuffer[buf] != fb->ColorDrawBuffer[buf]) { updated_drawbuffers(ctx); @@ -473,7 +563,7 @@ _mesa_update_draw_buffers(struct gl_context *ctx) GLuint i; /* should be a window system FBO */ - assert(ctx->DrawBuffer->Name == 0); + assert(_mesa_is_winsys_fbo(ctx->DrawBuffer)); for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) buffers[i] = ctx->Color.DrawBuffer[i]; @@ -494,7 +584,7 @@ _mesa_readbuffer(struct gl_context *ctx, GLenum buffer, GLint bufferIndex) { struct gl_framebuffer *fb = ctx->ReadBuffer; - if (fb->Name == 0) { + if (_mesa_is_winsys_fbo(fb)) { /* Only update the per-context READ_BUFFER state if we're bound to * a window-system framebuffer. */ @@ -520,7 +610,8 @@ _mesa_ReadBuffer(GLenum buffer) GLbitfield supportedMask; GLint srcBuffer; GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + + FLUSH_VERTICES(ctx, 0); if (MESA_VERBOSE & VERBOSE_API) _mesa_debug(ctx, "glReadBuffer %s\n", _mesa_lookup_enum_by_nr(buffer)); @@ -530,8 +621,8 @@ _mesa_ReadBuffer(GLenum buffer) if (MESA_VERBOSE & VERBOSE_API) _mesa_debug(ctx, "glReadBuffer %s\n", _mesa_lookup_enum_by_nr(buffer)); - if (fb->Name > 0 && buffer == GL_NONE) { - /* This is legal for user-created framebuffer objects */ + if (buffer == GL_NONE) { + /* This is legal--it means that no buffer should be bound for reading. */ srcBuffer = -1; } else { @@ -553,7 +644,6 @@ _mesa_ReadBuffer(GLenum buffer) /* OK, all error checking has been completed now */ _mesa_readbuffer(ctx, buffer, srcBuffer); - ctx->NewState |= _NEW_BUFFERS; /* * Call device driver function.