/**
* Prior to drawing anything with glBegin, glDrawArrays, etc. this function
* is called to see if it's valid to render. This involves checking that
* the current shader is valid and the framebuffer is complete.
* If an error is detected it'll be recorded here.
* \return GL_TRUE if OK to render, GL_FALSE if not
*/
GLboolean
_mesa_valid_to_render(GLcontext *ctx, const char *where)
{
if (ctx->Shader.CurrentProgram) {
/* using shaders */
if (!ctx->Shader.CurrentProgram->LinkStatus) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(shader not linked), where");
return GL_FALSE;
}
#if 0 /* not normally enabled */
{
char errMsg[100];
if (!_mesa_validate_shader_program(ctx, ctx->Shader.CurrentProgram,
errMsg)) {
_mesa_warning(ctx, "Shader program %u is invalid: %s",
ctx->Shader.CurrentProgram->Name, errMsg);
}
}
#endif
}
else {
if (ctx->VertexProgram.Enabled && !ctx->VertexProgram._Enabled) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(vertex program not valid)", where);
return GL_FALSE;
}
if (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(fragment program not valid)", where);
return GL_FALSE;
}
}
if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
_mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
"%s(incomplete framebuffer)", where);
return GL_FALSE;
}
#ifdef DEBUG
if (ctx->Shader.Flags & GLSL_LOG) {
struct gl_shader_program *shProg = ctx->Shader.CurrentProgram;
if (shProg) {
if (!shProg->_Used) {
/* This is the first time this shader is being used.
* Append shader's constants/uniforms to log file.
*/
GLuint i;
for (i = 0; i < shProg->NumShaders; i++) {
struct gl_shader *sh = shProg->Shaders[i];
if (sh->Type == GL_VERTEX_SHADER) {
_mesa_append_uniforms_to_file(sh,
&shProg->VertexProgram->Base);
}
else if (sh->Type == GL_FRAGMENT_SHADER) {
_mesa_append_uniforms_to_file(sh,
&shProg->FragmentProgram->Base);
}
}
shProg->_Used = GL_TRUE;
}
}
}
#endif
return GL_TRUE;
}
/**
* Prior to drawing anything with glBegin, glDrawArrays, etc. this function
* is called to see if it's valid to render. This involves checking that
* the current shader is valid and the framebuffer is complete.
* It also check the current pipeline object is valid if any.
* If an error is detected it'll be recorded here.
* \return GL_TRUE if OK to render, GL_FALSE if not
*/
GLboolean
_mesa_valid_to_render(struct gl_context *ctx, const char *where)
{
/* This depends on having up to date derived state (shaders) */
if (ctx->NewState)
_mesa_update_state(ctx);
if (ctx->API == API_OPENGL_COMPAT) {
/* Any shader stages that are not supplied by the GLSL shader and have
* assembly shaders enabled must now be validated.
*/
if (!ctx->_Shader->CurrentProgram[MESA_SHADER_VERTEX]
&& ctx->VertexProgram.Enabled && !ctx->VertexProgram._Enabled) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(vertex program not valid)", where);
return GL_FALSE;
}
if (!ctx->_Shader->CurrentProgram[MESA_SHADER_FRAGMENT]) {
if (ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(fragment program not valid)", where);
return GL_FALSE;
}
/* If drawing to integer-valued color buffers, there must be an
* active fragment shader (GL_EXT_texture_integer).
*/
if (ctx->DrawBuffer && ctx->DrawBuffer->_IntegerColor) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(integer format but no fragment shader)", where);
return GL_FALSE;
}
}
}
/* A pipeline object is bound */
if (ctx->_Shader->Name && !ctx->_Shader->Validated) {
if (!_mesa_validate_program_pipeline(ctx, ctx->_Shader)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glValidateProgramPipeline failed to validate the "
"pipeline");
return GL_FALSE;
}
}
/* If a program is active and SSO not in use, check if validation of
* samplers succeeded for the active program. */
if (ctx->_Shader->ActiveProgram && ctx->_Shader != ctx->Pipeline.Current) {
char errMsg[100];
if (!_mesa_sampler_uniforms_are_valid(ctx->_Shader->ActiveProgram,
errMsg, 100)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "%s", errMsg);
return GL_FALSE;
}
}
if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
_mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
"%s(incomplete framebuffer)", where);
return GL_FALSE;
}
if (!check_blend_func_error(ctx)) {
return GL_FALSE;
}
#ifdef DEBUG
if (ctx->_Shader->Flags & GLSL_LOG) {
struct gl_shader_program **shProg = ctx->_Shader->CurrentProgram;
gl_shader_stage i;
for (i = 0; i < MESA_SHADER_STAGES; i++) {
if (shProg[i] == NULL || shProg[i]->_Used
|| shProg[i]->_LinkedShaders[i] == NULL)
continue;
/* This is the first time this shader is being used.
* Append shader's constants/uniforms to log file.
*
* Only log data for the program target that matches the shader
* target. It's possible to have a program bound to the vertex
* shader target that also supplied a fragment shader. If that
* program isn't also bound to the fragment shader target we don't
* want to log its fragment data.
*/
_mesa_append_uniforms_to_file(shProg[i]->_LinkedShaders[i]);
}
for (i = 0; i < MESA_SHADER_STAGES; i++) {
if (shProg[i] != NULL)
shProg[i]->_Used = GL_TRUE;
}
}
#endif
return GL_TRUE;
}
