Revision: 29264
http://projects.blender.org/plugins/scmsvn/viewcvs.php?view=rev&root=bf-blender&revision=29264
Author: nicholasbishop
Date: 2010-06-06 09:07:58 +0200 (Sun, 06 Jun 2010)
Log Message:
-----------
Preparing VBO drawing code for colors.
* Added functions to load paintmask data into the color buffer
* Drawing is enabled, but no visible effect since I haven't set up any
paintmask layers yet.
Modified Paths:
--------------
branches/soc-2010-nicolasbishop/source/blender/gpu/intern/gpu_buffers.c
Modified:
branches/soc-2010-nicolasbishop/source/blender/gpu/intern/gpu_buffers.c
===================================================================
--- branches/soc-2010-nicolasbishop/source/blender/gpu/intern/gpu_buffers.c
2010-06-06 06:30:22 UTC (rev 29263)
+++ branches/soc-2010-nicolasbishop/source/blender/gpu/intern/gpu_buffers.c
2010-06-06 07:07:58 UTC (rev 29264)
@@ -388,7 +388,7 @@
typedef struct {
/* opengl buffer handles */
- GLuint vert_buf, index_buf;
+ GLuint vert_buf, index_buf, color_buf;
GLenum index_type;
/* mesh pointers in case buffer allocation fails */
@@ -406,6 +406,54 @@
unsigned int tot_tri, tot_quad;
} GPU_Buffers;
+static void delete_buffer(GLuint *buf)
+{
+ glDeleteBuffersARB(1, buf);
+ *buf = 0;
+}
+
+/* For purposes of displaying the mask on the mesh,
+ convert the mask strength to RGB-bytes */
+static void mask_to_gpu_colors(unsigned char out[3], float mask_strength)
+{
+ unsigned char v = (unsigned char)(mask_strength * 128.0f) + 64;
+ out[0] = v;
+ out[1] = v;
+ out[2] = v;
+}
+
+/* For now this looks for just a single mask layer, eventually might include
+ other color layers like vertex colors or weights */
+static void update_mesh_color_buffers(GPU_Buffers *buffers, CustomData
*vert_customdata, int totvert)
+{
+ unsigned char *color_data = NULL;
+ int i;
+ float *pmask;
+
+ /* Make a color buffer if there's a mask layer and
+ get rid of any color buffer if there's no mask layer */
+ pmask = CustomData_get_layer(vert_customdata, CD_PAINTMASK);
+ if(pmask && !buffers->color_buf)
+ glGenBuffersARB(1, &buffers->color_buf);
+ else if(!pmask && buffers->color_buf)
+ delete_buffer(&buffers->color_buf);
+
+ if(pmask && buffers->color_buf) {
+ glBindBufferARB(GL_ARRAY_BUFFER_ARB, buffers->color_buf);
+ glBufferDataARB(GL_ARRAY_BUFFER_ARB,
+ sizeof(char) * 3 * totvert,
+ NULL, GL_STATIC_DRAW_ARB);
+ color_data = glMapBufferARB(GL_ARRAY_BUFFER_ARB,
GL_WRITE_ONLY_ARB);
+ if(color_data) {
+ for(i = 0; i < totvert; ++i)
+ mask_to_gpu_colors(color_data + i*3, pmask[i]);
+ glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);
+ }
+ else
+ delete_buffer(&buffers->color_buf);
+ }
+}
+
void GPU_update_mesh_buffers(void *buffers_v, MVert *mvert,
int *vert_indices, int totvert)
{
@@ -432,10 +480,8 @@
glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);
}
- else {
- glDeleteBuffersARB(1, &buffers->vert_buf);
- buffers->vert_buf = 0;
- }
+ else
+ delete_buffer(&buffers->vert_buf);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
}
@@ -498,10 +544,8 @@
}
glUnmapBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB);
}
- else {
- glDeleteBuffersARB(1, &buffers->index_buf);
- buffers->index_buf = 0;
- }
+ else
+ delete_buffer(&buffers->index_buf);
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
}
@@ -561,10 +605,9 @@
}
glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);
}
- else {
- glDeleteBuffersARB(1, &buffers->vert_buf);
- buffers->vert_buf = 0;
- }
+ else
+ delete_buffer(&buffers->vert_buf);
+
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
}
@@ -618,10 +661,8 @@
}
glUnmapBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB);
}
- else {
- glDeleteBuffersARB(1, &buffers->index_buf);
- buffers->index_buf = 0;
- }
+ else
+ delete_buffer(&buffers->index_buf);
}
else {
unsigned int *quad_data;
@@ -648,10 +689,8 @@
}
glUnmapBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB);
}
- else {
- glDeleteBuffersARB(1, &buffers->index_buf);
- buffers->index_buf = 0;
- }
+ else
+ delete_buffer(&buffers->index_buf);
}
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
@@ -671,30 +710,51 @@
GPU_Buffers *buffers = buffers_v;
if(buffers->vert_buf && buffers->index_buf) {
+ GLboolean colmat;
+
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);
+ if(buffers->color_buf)
+ glEnableClientState(GL_COLOR_ARRAY);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, buffers->vert_buf);
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
buffers->index_buf);
+ if(buffers->color_buf) {
+ glGetBooleanv(GL_COLOR_MATERIAL, &colmat);
+ glEnable(GL_COLOR_MATERIAL);
+ }
+
if(buffers->tot_quad) {
glVertexPointer(3, GL_FLOAT, sizeof(DMGridData),
(void*)offsetof(DMGridData, co));
glNormalPointer(GL_FLOAT, sizeof(DMGridData),
(void*)offsetof(DMGridData, no));
+ if(buffers->color_buf) {
+ glBindBufferARB(GL_ARRAY_BUFFER_ARB,
buffers->color_buf);
+ glVertexPointer(3, GL_UNSIGNED_BYTE,
sizeof(char)*3, (void*)0);
+ }
glDrawElements(GL_QUADS, buffers->tot_quad * 4,
buffers->index_type, 0);
}
else {
glVertexPointer(3, GL_FLOAT,
sizeof(VertexBufferFormat), (void*)offsetof(VertexBufferFormat, co));
glNormalPointer(GL_SHORT, sizeof(VertexBufferFormat),
(void*)offsetof(VertexBufferFormat, no));
+ if(buffers->color_buf) {
+ glBindBufferARB(GL_ARRAY_BUFFER_ARB,
buffers->color_buf);
+ glVertexPointer(3, GL_UNSIGNED_BYTE,
sizeof(char)*3, (void*)0);
+ }
glDrawElements(GL_TRIANGLES, buffers->tot_tri * 3,
buffers->index_type, 0);
}
+ if(buffers->color_buf && !colmat)
+ glDisable(GL_COLOR_MATERIAL);
+
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
+ glDisableClientState(GL_COLOR_ARRAY);
}
else if(buffers->totface) {
/* fallback if we are out of memory */
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