diff options
Diffstat (limited to 'src/mesa/main/buffers.c')
| -rw-r--r-- | src/mesa/main/buffers.c | 245 |
1 files changed, 130 insertions, 115 deletions
diff --git a/src/mesa/main/buffers.c b/src/mesa/main/buffers.c index 9a049e94c73..2288e51f6ea 100644 --- a/src/mesa/main/buffers.c +++ b/src/mesa/main/buffers.c @@ -389,9 +389,9 @@ _mesa_NamedFramebufferDrawBuffer(GLuint framebuffer, GLenum buf) * that is considered special and allowed as far as n is one * since 4.5. */ -static void -draw_buffers(struct gl_context *ctx, struct gl_framebuffer *fb, - GLsizei n, const GLenum *buffers, const char *caller) +static ALWAYS_INLINE void +draw_buffers(struct gl_context *ctx, struct gl_framebuffer *fb, GLsizei n, + const GLenum *buffers, const char *caller, bool no_error) { GLuint output; GLbitfield usedBufferMask, supportedMask; @@ -399,101 +399,105 @@ draw_buffers(struct gl_context *ctx, struct gl_framebuffer *fb, 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) { - _mesa_error(ctx, GL_INVALID_VALUE, "%s(n < 0)", caller); - return; - } + if (!no_error) { + /* 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) { + _mesa_error(ctx, GL_INVALID_VALUE, "%s(n < 0)", caller); + return; + } - if (n > (GLsizei) ctx->Const.MaxDrawBuffers) { - _mesa_error(ctx, GL_INVALID_VALUE, - "%s(n > maximum number of draw buffers)", caller); - return; + if (n > (GLsizei) ctx->Const.MaxDrawBuffers) { + _mesa_error(ctx, GL_INVALID_VALUE, + "%s(n > maximum number of draw buffers)", caller); + return; + } + + /* 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." + * (same restriction applies with GL_EXT_draw_buffers specification) + */ + if (ctx->API == API_OPENGLES2 && _mesa_is_winsys_fbo(fb) && + (n != 1 || (buffers[0] != GL_NONE && buffers[0] != GL_BACK))) { + _mesa_error(ctx, GL_INVALID_OPERATION, "%s(invalid buffers)", caller); + return; + } } supportedMask = supported_buffer_bitmask(ctx, fb); 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." - * (same restriction applies with GL_EXT_draw_buffers specification) - */ - if (ctx->API == API_OPENGLES2 && _mesa_is_winsys_fbo(fb) && - (n != 1 || (buffers[0] != GL_NONE && buffers[0] != GL_BACK))) { - _mesa_error(ctx, GL_INVALID_OPERATION, "%s(invalid buffers)", caller); - return; - } - /* complicated error checking... */ for (output = 0; output < n; output++) { 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, "%s(invalid buffer %s)", - caller, _mesa_enum_to_string(buffers[output])); - return; - } - - /* From the OpenGL 4.5 specification, page 493 (page 515 of the PDF) - * "An INVALID_ENUM error is generated if any value in bufs is FRONT, - * LEFT, RIGHT, or FRONT_AND_BACK . This restriction applies to both - * the default framebuffer and framebuffer objects, and exists because - * these constants may themselves refer to multiple buffers, as shown - * in table 17.4." - * - * And on page 492 (page 514 of the PDF): - * "If the default framebuffer is affected, then each of the constants - * must be one of the values listed in table 17.6 or the special value - * BACK. When BACK is used, n must be 1 and color values are written - * into the left buffer for single-buffered contexts, or into the back - * left buffer for double-buffered contexts." - * - * Note "special value BACK". GL_BACK also refers to multiple buffers, - * but it is consider a special case here. This is a change on 4.5. For - * OpenGL 4.x we check that behaviour. For any previous version we keep - * considering it wrong (as INVALID_ENUM). - */ - if (_mesa_bitcount(destMask[output]) > 1) { - if (_mesa_is_winsys_fbo(fb) && ctx->Version >= 40 && - buffers[output] == GL_BACK) { - if (n != 1) { - _mesa_error(ctx, GL_INVALID_OPERATION, "%s(with GL_BACK n must be 1)", - caller); - return; - } - } else { + if (!no_error) { + /* 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, "%s(invalid buffer %s)", caller, _mesa_enum_to_string(buffers[output])); return; } - } - /* Section 4.2 (Whole Framebuffer Operations) of the OpenGL ES 3.0 - * specification says: - * - * "If the GL is bound to a draw framebuffer object, the ith buffer - * listed in bufs must be COLOR_ATTACHMENTi or NONE . Specifying a - * buffer out of order, BACK , or COLOR_ATTACHMENTm where m is greater - * than or equal to the value of MAX_- COLOR_ATTACHMENTS , will - * generate the error INVALID_OPERATION . - */ - if (_mesa_is_gles3(ctx) && _mesa_is_user_fbo(fb) && - buffers[output] != GL_NONE && - (buffers[output] < GL_COLOR_ATTACHMENT0 || - buffers[output] >= GL_COLOR_ATTACHMENT0 + ctx->Const.MaxColorAttachments)) { - _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawBuffers(buffer)"); - return; + /* From the OpenGL 4.5 specification, page 493 (page 515 of the PDF) + * "An INVALID_ENUM error is generated if any value in bufs is FRONT, + * LEFT, RIGHT, or FRONT_AND_BACK . This restriction applies to both + * the default framebuffer and framebuffer objects, and exists because + * these constants may themselves refer to multiple buffers, as shown + * in table 17.4." + * + * And on page 492 (page 514 of the PDF): + * "If the default framebuffer is affected, then each of the constants + * must be one of the values listed in table 17.6 or the special value + * BACK. When BACK is used, n must be 1 and color values are written + * into the left buffer for single-buffered contexts, or into the back + * left buffer for double-buffered contexts." + * + * Note "special value BACK". GL_BACK also refers to multiple buffers, + * but it is consider a special case here. This is a change on 4.5. + * For OpenGL 4.x we check that behaviour. For any previous version we + * keep considering it wrong (as INVALID_ENUM). + */ + if (_mesa_bitcount(destMask[output]) > 1) { + if (_mesa_is_winsys_fbo(fb) && ctx->Version >= 40 && + buffers[output] == GL_BACK) { + if (n != 1) { + _mesa_error(ctx, GL_INVALID_OPERATION, "%s(with GL_BACK n must be 1)", + caller); + return; + } + } else { + _mesa_error(ctx, GL_INVALID_ENUM, "%s(invalid buffer %s)", + caller, _mesa_enum_to_string(buffers[output])); + return; + } + } + + /* Section 4.2 (Whole Framebuffer Operations) of the OpenGL ES 3.0 + * specification says: + * + * "If the GL is bound to a draw framebuffer object, the ith + * buffer listed in bufs must be COLOR_ATTACHMENTi or NONE . + * Specifying a buffer out of order, BACK , or COLOR_ATTACHMENTm + * where m is greater than or equal to the value of MAX_- + * COLOR_ATTACHMENTS , will generate the error INVALID_OPERATION . + */ + if (_mesa_is_gles3(ctx) && _mesa_is_user_fbo(fb) && + buffers[output] != GL_NONE && + (buffers[output] < GL_COLOR_ATTACHMENT0 || + buffers[output] >= GL_COLOR_ATTACHMENT0 + ctx->Const.MaxColorAttachments)) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawBuffers(buffer)"); + return; + } } if (buffers[output] == GL_NONE) { @@ -508,7 +512,7 @@ draw_buffers(struct gl_context *ctx, struct gl_framebuffer *fb, * or equal to the value of MAX_COLOR_ATTACHMENTS, then the error * INVALID_OPERATION results." */ - if (_mesa_is_user_fbo(fb) && buffers[output] >= + if (!no_error && _mesa_is_user_fbo(fb) && buffers[output] >= GL_COLOR_ATTACHMENT0 + ctx->Const.MaxDrawBuffers) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(buffers[%d] >= maximum number of draw buffers)", @@ -527,37 +531,40 @@ draw_buffers(struct gl_context *ctx, struct gl_framebuffer *fb, * INVALID_OPERATION results." */ destMask[output] &= supportedMask; - if (destMask[output] == 0) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "%s(unsupported buffer %s)", - caller, _mesa_enum_to_string(buffers[output])); - return; - } + if (!no_error) { + if (destMask[output] == 0) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "%s(unsupported buffer %s)", + caller, _mesa_enum_to_string(buffers[output])); + 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." - * (same restriction applies with GL_EXT_draw_buffers specification) - */ - if (ctx->API == API_OPENGLES2 && _mesa_is_user_fbo(fb) && - buffers[output] != GL_NONE && - buffers[output] != GL_COLOR_ATTACHMENT0 + output) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "%s(unsupported buffer %s)", - caller, _mesa_enum_to_string(buffers[output])); - 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." (same restriction applies with + * GL_EXT_draw_buffers specification) + */ + if (ctx->API == API_OPENGLES2 && _mesa_is_user_fbo(fb) && + buffers[output] != GL_NONE && + buffers[output] != GL_COLOR_ATTACHMENT0 + output) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "%s(unsupported buffer %s)", + caller, _mesa_enum_to_string(buffers[output])); + 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) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "%s(duplicated buffer %s)", - caller, _mesa_enum_to_string(buffers[output])); - 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) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "%s(duplicated buffer %s)", + caller, _mesa_enum_to_string(buffers[output])); + return; + } } /* update bitmask */ @@ -583,11 +590,19 @@ draw_buffers(struct gl_context *ctx, struct gl_framebuffer *fb, } +static void +draw_buffers_error(struct gl_context *ctx, struct gl_framebuffer *fb, GLsizei n, + const GLenum *buffers, const char *caller) +{ + draw_buffers(ctx, fb, n, buffers, caller, false); +} + + void GLAPIENTRY _mesa_DrawBuffers(GLsizei n, const GLenum *buffers) { GET_CURRENT_CONTEXT(ctx); - draw_buffers(ctx, ctx->DrawBuffer, n, buffers, "glDrawBuffers"); + draw_buffers_error(ctx, ctx->DrawBuffer, n, buffers, "glDrawBuffers"); } @@ -607,7 +622,7 @@ _mesa_NamedFramebufferDrawBuffers(GLuint framebuffer, GLsizei n, else fb = ctx->WinSysDrawBuffer; - draw_buffers(ctx, fb, n, bufs, "glNamedFramebufferDrawBuffers"); + draw_buffers_error(ctx, fb, n, bufs, "glNamedFramebufferDrawBuffers"); } |